diff --git a/app/assets/javascripts/discourse/app/components/bulk-select-button.js b/app/assets/javascripts/discourse/app/components/bulk-select-button.js
index 9f46112d23d..e3359e1f738 100644
--- a/app/assets/javascripts/discourse/app/components/bulk-select-button.js
+++ b/app/assets/javascripts/discourse/app/components/bulk-select-button.js
@@ -1,5 +1,6 @@
 import Component from "@ember/component";
 import { schedule } from "@ember/runloop";
+import { reads } from "@ember/object/computed";
 import showModal from "discourse/lib/show-modal";
 
 export default Component.extend({
@@ -17,6 +18,8 @@ export default Component.extend({
     });
   },
 
+  canDoBulkActions: reads("currentUser.staff"),
+
   actions: {
     showBulkActions() {
       const controller = showModal("topic-bulk-actions", {
diff --git a/app/assets/javascripts/discourse/app/components/topic-dismiss-buttons.js b/app/assets/javascripts/discourse/app/components/topic-dismiss-buttons.js
new file mode 100644
index 00000000000..5092bfe2df8
--- /dev/null
+++ b/app/assets/javascripts/discourse/app/components/topic-dismiss-buttons.js
@@ -0,0 +1,105 @@
+import { action } from "@ember/object";
+import showModal from "discourse/lib/show-modal";
+import { later } from "@ember/runloop";
+import isElementInViewport from "discourse/lib/is-element-in-viewport";
+import discourseComputed, { on } from "discourse-common/utils/decorators";
+import I18n from "I18n";
+import Component from "@ember/component";
+
+export default Component.extend({
+  tagName: "",
+  classNames: ["topic-dismiss-buttons"],
+
+  position: null,
+  selectedTopics: null,
+  model: null,
+
+  @discourseComputed("position")
+  containerClass(position) {
+    return `dismiss-container-${position}`;
+  },
+
+  @discourseComputed("position")
+  dismissReadId(position) {
+    return `dismiss-topics-${position}`;
+  },
+
+  @discourseComputed("position")
+  dismissNewId(position) {
+    return `dismiss-new-${position}`;
+  },
+
+  @discourseComputed(
+    "position",
+    "isOtherDismissUnreadButtonVisible",
+    "isOtherDismissNewButtonVisible"
+  )
+  showBasedOnPosition(
+    position,
+    isOtherDismissUnreadButtonVisible,
+    isOtherDismissNewButtonVisible
+  ) {
+    if (position !== "top") {
+      return true;
+    }
+
+    return !(
+      isOtherDismissUnreadButtonVisible || isOtherDismissNewButtonVisible
+    );
+  },
+
+  @discourseComputed("selectedTopics.length")
+  dismissLabel(selectedTopicCount) {
+    if (selectedTopicCount === 0) {
+      return I18n.t("topics.bulk.dismiss_button");
+    }
+    return I18n.t("topics.bulk.dismiss_button_with_selected", {
+      count: selectedTopicCount,
+    });
+  },
+
+  @discourseComputed("selectedTopics.length")
+  dismissNewLabel(selectedTopicCount) {
+    if (selectedTopicCount === 0) {
+      return I18n.t("topics.bulk.dismiss_new");
+    }
+    return I18n.t("topics.bulk.dismiss_new_with_selected", {
+      count: selectedTopicCount,
+    });
+  },
+
+  // we want to only render the Dismiss... button at the top of the
+  // page if the user cannot see the bottom Dismiss... button based on their
+  // viewport, or if too many topics fill the page
+  @on("didInsertElement")
+  _determineOtherDismissVisibility() {
+    later(() => {
+      if (this.position === "top") {
+        this.set(
+          "isOtherDismissUnreadButtonVisible",
+          isElementInViewport(document.getElementById("dismiss-topics-bottom"))
+        );
+        this.set(
+          "isOtherDismissNewButtonVisible",
+          isElementInViewport(document.getElementById("dismiss-new-bottom"))
+        );
+      } else {
+        this.set("isOtherDismissUnreadButtonVisible", true);
+        this.set("isOtherDismissNewButtonVisible", true);
+      }
+    });
+  },
+
+  @action
+  dismissReadPosts() {
+    let dismissTitle = "topics.bulk.dismiss_read";
+    if (this.selectedTopics.length > 0) {
+      dismissTitle = "topics.bulk.dismiss_read_with_selected";
+    }
+    showModal("dismiss-read", {
+      titleTranslated: I18n.t(dismissTitle, {
+        count: this.selectedTopics.length,
+      }),
+    });
+  },
+});
diff --git a/app/assets/javascripts/discourse/app/components/watch-read.js b/app/assets/javascripts/discourse/app/components/watch-read.js
index 66030689805..e375f4e183e 100644
--- a/app/assets/javascripts/discourse/app/components/watch-read.js
+++ b/app/assets/javascripts/discourse/app/components/watch-read.js
@@ -13,7 +13,7 @@ export default Component.extend({
     if (path === "faq" || path === "guidelines") {
       $(window).on("load.faq resize.faq scroll.faq", () => {
         const faqUnread = !currentUser.get("read_faq");
-        if (faqUnread && isElementInViewport($(".contents p").last())) {
+        if (faqUnread && isElementInViewport($(".contents p").last()[0])) {
           this.action();
         }
       });
diff --git a/app/assets/javascripts/discourse/app/controllers/discovery/topics.js b/app/assets/javascripts/discourse/app/controllers/discovery/topics.js
index 6e33eb20fce..99afc1dedab 100644
--- a/app/assets/javascripts/discourse/app/controllers/discovery/topics.js
+++ b/app/assets/javascripts/discourse/app/controllers/discovery/topics.js
@@ -18,7 +18,6 @@ import discourseComputed from "discourse-common/utils/decorators";
 import { endWith } from "discourse/lib/computed";
 import { routeAction } from "discourse/helpers/route-action";
 import { inject as service } from "@ember/service";
-import showModal from "discourse/lib/show-modal";
 import { userPath } from "discourse/lib/url";
 
 const controllerOpts = {
@@ -39,6 +38,18 @@ const controllerOpts = {
   order: readOnly("model.params.order"),
   ascending: readOnly("model.params.ascending"),
 
+  selected: null,
+
+  @discourseComputed("model.filter", "model.topics.length")
+  showDismissRead(filter, topicsLength) {
+    return this._isFilterPage(filter, "unread") && topicsLength > 0;
+  },
+
+  @discourseComputed("model.filter", "model.topics.length")
+  showResetNew(filter, topicsLength) {
+    return this._isFilterPage(filter, "new") && topicsLength > 0;
+  },
+
   actions: {
     changeSort() {
       deprecated(
@@ -98,17 +109,20 @@ const controllerOpts = {
         (this.router.currentRoute.queryParams["f"] ||
           this.router.currentRoute.queryParams["filter"]) === "tracked";
 
-      Topic.resetNew(this.category, !this.noSubcategories, tracked).then(() =>
+      let topicIds = this.selected
+        ? this.selected.map((topic) => topic.id)
+        : null;
+
+      Topic.resetNew(this.category, !this.noSubcategories, {
+        tracked,
+        topicIds,
+      }).then(() =>
         this.send(
           "refresh",
           tracked ? { skipResettingParams: ["filter", "f"] } : {}
         )
       );
     },
-
-    dismissReadPosts() {
-      showModal("dismiss-read", { title: "topics.bulk.dismiss_read" });
-    },
   },
 
   afterRefresh(filter, list, listModel = list) {
@@ -122,32 +136,6 @@ const controllerOpts = {
     this.send("loadingComplete");
   },
 
-  isFilterPage: function (filter, filterType) {
-    if (!filter) {
-      return false;
-    }
-    return filter.match(new RegExp(filterType + "$", "gi")) ? true : false;
-  },
-
-  @discourseComputed("model.filter", "model.topics.length")
-  showDismissRead(filter, topicsLength) {
-    return this.isFilterPage(filter, "unread") && topicsLength > 0;
-  },
-
-  @discourseComputed("model.filter", "model.topics.length")
-  showResetNew(filter, topicsLength) {
-    return this.isFilterPage(filter, "new") && topicsLength > 0;
-  },
-
-  @discourseComputed("model.filter", "model.topics.length")
-  showDismissAtTop(filter, topicsLength) {
-    return (
-      (this.isFilterPage(filter, "new") ||
-        this.isFilterPage(filter, "unread")) &&
-      topicsLength >= 15
-    );
-  },
-
   hasTopics: gt("model.topics.length", 0),
   allLoaded: empty("model.more_topics_url"),
   latest: endWith("model.filter", "latest"),
diff --git a/app/assets/javascripts/discourse/app/controllers/tag-show.js b/app/assets/javascripts/discourse/app/controllers/tag-show.js
index 0bf4cec6a96..76b7d070cb5 100644
--- a/app/assets/javascripts/discourse/app/controllers/tag-show.js
+++ b/app/assets/javascripts/discourse/app/controllers/tag-show.js
@@ -8,7 +8,6 @@ import Topic from "discourse/models/topic";
 import { alias } from "@ember/object/computed";
 import bootbox from "bootbox";
 import { queryParams } from "discourse/controllers/discovery-sortable";
-import showModal from "discourse/lib/show-modal";
 
 export default Controller.extend(BulkTopicSelection, FilterModeMixin, {
   application: controller(),
@@ -93,48 +92,31 @@ export default Controller.extend(BulkTopicSelection, FilterModeMixin, {
     }
   },
 
-  isFilterPage: function (filter, filterType) {
-    if (!filter) {
-      return false;
-    }
-    return filter.match(new RegExp(filterType + "$", "gi")) ? true : false;
-  },
-
   @discourseComputed("list.filter", "list.topics.length")
   showDismissRead(filter, topicsLength) {
-    return this.isFilterPage(filter, "unread") && topicsLength > 0;
+    return this._isFilterPage(filter, "unread") && topicsLength > 0;
   },
 
   @discourseComputed("list.filter", "list.topics.length")
   showResetNew(filter, topicsLength) {
-    return this.isFilterPage(filter, "new") && topicsLength > 0;
-  },
-
-  @discourseComputed("list.filter", "list.topics.length")
-  showDismissAtTop(filter, topicsLength) {
-    return (
-      (this.isFilterPage(filter, "new") ||
-        this.isFilterPage(filter, "unread")) &&
-      topicsLength >= 15
-    );
+    return this._isFilterPage(filter, "new") && topicsLength > 0;
   },
 
   actions: {
-    dismissReadPosts() {
-      showModal("dismiss-read", { title: "topics.bulk.dismiss_read" });
-    },
-
     resetNew() {
       const tracked =
         (this.router.currentRoute.queryParams["f"] ||
           this.router.currentRoute.queryParams["filter"]) === "tracked";
 
-      Topic.resetNew(
-        this.category,
-        !this.noSubcategories,
+      let topicIds = this.selected
+        ? this.selected.map((topic) => topic.id)
+        : null;
+
+      Topic.resetNew(this.category, !this.noSubcategories, {
         tracked,
-        this.tag
-      ).then(() =>
+        tag: this.tag,
+        topicIds,
+      }).then(() =>
         this.send(
           "refresh",
           tracked ? { skipResettingParams: ["filter", "f"] } : {}
diff --git a/app/assets/javascripts/discourse/app/controllers/topic.js b/app/assets/javascripts/discourse/app/controllers/topic.js
index 6699af2c537..c6a5289b2b6 100644
--- a/app/assets/javascripts/discourse/app/controllers/topic.js
+++ b/app/assets/javascripts/discourse/app/controllers/topic.js
@@ -1639,7 +1639,7 @@ export default Controller.extend(bufferedProperty("model"), {
       function () {
         const $post = $(`.topic-post article#post_${postNumber}`);
 
-        if ($post.length === 0 || isElementInViewport($post)) {
+        if ($post.length === 0 || isElementInViewport($post[0])) {
           return;
         }
 
diff --git a/app/assets/javascripts/discourse/app/lib/is-element-in-viewport.js b/app/assets/javascripts/discourse/app/lib/is-element-in-viewport.js
index 5bac8fafc83..21d725fd32b 100644
--- a/app/assets/javascripts/discourse/app/lib/is-element-in-viewport.js
+++ b/app/assets/javascripts/discourse/app/lib/is-element-in-viewport.js
@@ -1,6 +1,6 @@
 export default function (element) {
-  if (element instanceof jQuery) {
-    element = element[0];
+  if (!element) {
+    return;
   }
 
   const $window = $(window),
diff --git a/app/assets/javascripts/discourse/app/lib/show-modal.js b/app/assets/javascripts/discourse/app/lib/show-modal.js
index f2602e01969..db3067fbcf5 100644
--- a/app/assets/javascripts/discourse/app/lib/show-modal.js
+++ b/app/assets/javascripts/discourse/app/lib/show-modal.js
@@ -41,6 +41,8 @@ export default function (name, opts) {
   route.render(fullName, renderArgs);
   if (opts.title) {
     modalController.set("title", I18n.t(opts.title));
+  } else if (opts.titleTranslated) {
+    modalController.set("title", opts.titleTranslated);
   } else {
     modalController.set("title", null);
   }
diff --git a/app/assets/javascripts/discourse/app/mixins/bulk-topic-selection.js b/app/assets/javascripts/discourse/app/mixins/bulk-topic-selection.js
index 7ba734c65da..f2a11771ee2 100644
--- a/app/assets/javascripts/discourse/app/mixins/bulk-topic-selection.js
+++ b/app/assets/javascripts/discourse/app/mixins/bulk-topic-selection.js
@@ -1,8 +1,8 @@
 import Mixin from "@ember/object/mixin";
+import { or } from "@ember/object/computed";
+import { on } from "discourse-common/utils/decorators";
 import { NotificationLevels } from "discourse/lib/notification-levels";
 import Topic from "discourse/models/topic";
-import { alias } from "@ember/object/computed";
-import { on } from "discourse-common/utils/decorators";
 import { inject as service } from "@ember/service";
 
 export default Mixin.create({
@@ -12,13 +12,20 @@ export default Mixin.create({
   autoAddTopicsToBulkSelect: false,
   selected: null,
 
-  canBulkSelect: alias("currentUser.staff"),
+  canBulkSelect: or("currentUser.staff", "showDismissRead", "showResetNew"),
 
   @on("init")
   resetSelected() {
     this.set("selected", []);
   },
 
+  _isFilterPage(filter, filterType) {
+    if (!filter) {
+      return false;
+    }
+    return new RegExp(filterType + "$", "gi").test(filter);
+  },
+
   actions: {
     toggleBulkSelect() {
       this.toggleProperty("bulkSelectEnabled");
diff --git a/app/assets/javascripts/discourse/app/models/topic.js b/app/assets/javascripts/discourse/app/models/topic.js
index 37be80796ce..822caf52d98 100644
--- a/app/assets/javascripts/discourse/app/models/topic.js
+++ b/app/assets/javascripts/discourse/app/models/topic.js
@@ -756,7 +756,14 @@ Topic.reopenClass({
     });
   },
 
-  resetNew(category, include_subcategories, tracked = false, tag = false) {
+  resetNew(category, include_subcategories, opts = {}) {
+    let { tracked, tag, topicIds } = {
+      tracked: false,
+      tag: null,
+      topicIds: null,
+      ...opts,
+    };
+
     const data = { tracked };
     if (category) {
       data.category_id = category.id;
@@ -765,6 +772,9 @@ Topic.reopenClass({
     if (tag) {
       data.tag_id = tag.id;
     }
+    if (topicIds) {
+      data.topic_ids = topicIds;
+    }
 
     return ajax("/topics/reset-new", { type: "PUT", data });
   },
diff --git a/app/assets/javascripts/discourse/app/templates/components/bulk-select-button.hbs b/app/assets/javascripts/discourse/app/templates/components/bulk-select-button.hbs
index bdc803ae479..77306f93e11 100644
--- a/app/assets/javascripts/discourse/app/templates/components/bulk-select-button.hbs
+++ b/app/assets/javascripts/discourse/app/templates/components/bulk-select-button.hbs
@@ -1,5 +1,7 @@
-{{#if selected}}
-  <div id="bulk-select">
-    {{d-button class="btn-default bulk-select-btn" action=(action "showBulkActions") icon="wrench"}}
-  </div>
+{{#if canDoBulkActions}}
+  {{#if selected}}
+    <div id="bulk-select">
+      {{d-button class="btn-default bulk-select-btn" action=(action "showBulkActions") icon="wrench"}}
+    </div>
+  {{/if}}
 {{/if}}
diff --git a/app/assets/javascripts/discourse/app/templates/components/topic-dismiss-buttons.hbs b/app/assets/javascripts/discourse/app/templates/components/topic-dismiss-buttons.hbs
new file mode 100644
index 00000000000..32d9e25d5d4
--- /dev/null
+++ b/app/assets/javascripts/discourse/app/templates/components/topic-dismiss-buttons.hbs
@@ -0,0 +1,21 @@
+{{#if showBasedOnPosition}}
+  <div class="row {{containerClass}}">
+    {{#if showDismissRead}}
+      {{d-button
+        class="btn-default dismiss-read"
+        id=dismissReadId
+        action=(action "dismissReadPosts")
+        translatedLabel=dismissLabel
+        title="topics.bulk.dismiss_tooltip"}}
+    {{/if}}
+    {{#if showResetNew}}
+      {{d-button
+        class="btn-default dismiss-read"
+        id=dismissNewId
+        action=resetNew
+        icon="check"
+        translatedLabel=dismissNewLabel}}
+    {{/if}}
+  </div>
+{{/if}}
+
diff --git a/app/assets/javascripts/discourse/app/templates/discovery/topics.hbs b/app/assets/javascripts/discourse/app/templates/discovery/topics.hbs
index ca4e8cbe82c..3e9e8d38757 100644
--- a/app/assets/javascripts/discourse/app/templates/discovery/topics.hbs
+++ b/app/assets/javascripts/discourse/app/templates/discovery/topics.hbs
@@ -2,26 +2,8 @@
   <div class="alert alert-info">{{redirectedReason}}</div>
 {{/if}}
 
-{{#if showDismissAtTop}}
-  <div class="row dismiss-container-top">
-    {{#if showDismissRead}}
-      {{d-button
-        class="btn-default dismiss-read"
-        id="dismiss-topics-top"
-        action=(action "dismissReadPosts")
-        title="topics.bulk.dismiss_tooltip"
-        label="topics.bulk.dismiss_button"}}
-    {{/if}}
-    {{#if showResetNew}}
-      {{d-button
-        class="btn-default dismiss-read"
-        id="dismiss-new-top"
-        action=(action "resetNew")
-        icon="check"
-        label="topics.bulk.dismiss_new"}}
-    {{/if}}
-  </div>
-{{/if}}
+{{topic-dismiss-buttons position="top" selectedTopics=selected
+model=model showResetNew=showResetNew showDismissRead=showDismissRead resetNew=(action "resetNew")}}
 
 {{#if model.sharedDrafts}}
   {{topic-list
@@ -89,22 +71,8 @@
 <footer class="topic-list-bottom">
   {{conditional-loading-spinner condition=model.loadingMore}}
   {{#if allLoaded}}
-    {{#if showDismissRead}}
-      {{d-button
-        class="btn-default dismiss-read"
-        id="dismiss-topics"
-        action=(action "dismissReadPosts")
-        title="topics.bulk.dismiss_tooltip"
-        label="topics.bulk.dismiss_button"}}
-    {{/if}}
-    {{#if showResetNew}}
-      {{d-button
-        class="btn-default dismiss-read"
-        action=(action "resetNew")
-        id="dismiss-new"
-        icon="check"
-        label="topics.bulk.dismiss_new"}}
-    {{/if}}
+    {{topic-dismiss-buttons position="bottom" selectedTopics=selected
+    model=model showResetNew=showResetNew showDismissRead=showDismissRead resetNew=(action "resetNew")}}
 
     {{#footer-message education=footerEducation message=footerMessage}}
       {{#if latest}}
diff --git a/app/assets/javascripts/discourse/app/templates/mobile/discovery/topics.hbs b/app/assets/javascripts/discourse/app/templates/mobile/discovery/topics.hbs
index cb6635347c5..a7511399949 100644
--- a/app/assets/javascripts/discourse/app/templates/mobile/discovery/topics.hbs
+++ b/app/assets/javascripts/discourse/app/templates/mobile/discovery/topics.hbs
@@ -1,23 +1,5 @@
-{{#if showDismissAtTop}}
-  <div class="row dismiss-container-top">
-    {{#if showDismissRead}}
-      {{d-button
-        class="btn-default dismiss-read"
-        id="dismiss-topics-top"
-        action=(action "dismissReadPosts")
-        title="topics.bulk.dismiss_tooltip"
-        label="topics.bulk.dismiss_button"}}
-    {{/if}}
-    {{#if showResetNew}}
-      {{d-button
-        class="btn-default dismiss-read"
-        id="dismiss-new-top"
-        action=(action "resetNew")
-        icon="check"
-        label="topics.bulk.dismiss_new"}}
-    {{/if}}
-  </div>
-{{/if}}
+{{topic-dismiss-buttons position="top" selectedTopics=selected
+model=model showResetNew=showResetNew showDismissRead=showDismissRead resetNew=(action "resetNew")}}
 
 {{#discovery-topics-list model=model refresh=(action "refresh") incomingCount=topicTrackingState.incomingCount as |discoveryTopicList|}}
   {{#if top}}
@@ -51,22 +33,8 @@
 <footer class="topic-list-bottom">
   {{conditional-loading-spinner condition=model.loadingMore}}
   {{#if allLoaded}}
-    {{#if showDismissRead}}
-      {{d-button
-        class="btn-default dismiss-read"
-        id="dismiss-topics"
-        action=(action "dismissReadPosts")
-        title="topics.bulk.dismiss_tooltip"
-        label="topics.bulk.dismiss_button"}}
-    {{/if}}
-    {{#if showResetNew}}
-      {{d-button
-        class="btn-default dismiss-read"
-        id="dismiss-new"
-        action=(action "resetNew")
-        icon="check"
-        label="topics.bulk.dismiss_new"}}
-    {{/if}}
+    {{topic-dismiss-buttons position="bottom" selectedTopics=selected
+    model=model showResetNew=showResetNew showDismissRead=showDismissRead resetNew=(action "resetNew")}}
 
     {{#footer-message education=footerEducation message=footerMessage}}
       {{#if latest}}
diff --git a/app/assets/javascripts/discourse/app/templates/tags/show.hbs b/app/assets/javascripts/discourse/app/templates/tags/show.hbs
index 14b37fac1d6..3a3438dde7e 100644
--- a/app/assets/javascripts/discourse/app/templates/tags/show.hbs
+++ b/app/assets/javascripts/discourse/app/templates/tags/show.hbs
@@ -37,29 +37,8 @@
 
   {{plugin-outlet name="discovery-list-container-top" args=(hash category=category)}}
 
-  {{#if showDismissAtTop}}
-    <div class="row dismiss-container-top">
-      {{#if showDismissRead}}
-        {{d-button
-          class="btn-default dismiss-read"
-          id="dismiss-topics"
-          action=(action "dismissReadPosts")
-          title="topics.bulk.dismiss_tooltip"
-          label="topics.bulk.dismiss_button"
-        }}
-      {{/if}}
-
-      {{#if showResetNew}}
-        {{d-button
-          class="btn-default dismiss-read"
-          action=(action "resetNew")
-          id="dismiss-new"
-          icon="check"
-          label="topics.bulk.dismiss_new"
-        }}
-      {{/if}}
-    </div>
-  {{/if}}
+  {{topic-dismiss-buttons position="top" selectedTopics=selected
+    model=model showResetNew=showResetNew showDismissRead=showDismissRead resetNew=(action "resetNew")}}
 
   <div class="container list-container">
     <div class="row">
@@ -99,25 +78,8 @@
             {{/if}}
 
             <footer class="topic-list-bottom">
-              {{#if showDismissRead}}
-                {{d-button
-                  class="btn-default dismiss-read"
-                  id="dismiss-topics"
-                  action=(action "dismissReadPosts")
-                  title="topics.bulk.dismiss_tooltip"
-                  label="topics.bulk.dismiss_button"
-                }}
-              {{/if}}
-
-              {{#if showResetNew}}
-                {{d-button
-                  class="btn-default dismiss-read"
-                  action=(action "resetNew")
-                  id="dismiss-new"
-                  icon="check"
-                  label="topics.bulk.dismiss_new"
-                }}
-              {{/if}}
+              {{topic-dismiss-buttons position="bottom" selectedTopics=selected
+              model=model showResetNew=showResetNew showDismissRead=showDismissRead resetNew=(action "resetNew")}}
 
               {{#footer-message education=footerEducation message=footerMessage}}
                 {{#link-to "tags"}} {{i18n "topic.browse_all_tags"}}{{/link-to}} {{i18n "or"}} {{#link-to "discovery.latest"}}{{i18n "topic.view_latest_topics"}}{{/link-to}}.
diff --git a/app/controllers/topics_controller.rb b/app/controllers/topics_controller.rb
index 343178d9a94..a7814a22991 100644
--- a/app/controllers/topics_controller.rb
+++ b/app/controllers/topics_controller.rb
@@ -245,11 +245,11 @@ class TopicsController < ApplicationController
     params.require(:topic_id)
     params.require(:post_ids)
 
-    post_ids = params[:post_ids].map(&:to_i)
-    unless Array === post_ids
+    unless Array === params[:post_ids]
       render_json_error("Expecting post_ids to contain a list of posts ids")
       return
     end
+    post_ids = params[:post_ids].map(&:to_i)
 
     if post_ids.length > 100
       render_json_error("Requested a chunk that is too big")
@@ -911,6 +911,11 @@ class TopicsController < ApplicationController
 
   def bulk
     if params[:topic_ids].present?
+      unless Array === params[:topic_ids]
+        raise Discourse::InvalidParameters.new(
+          "Expecting topic_ids to contain a list of topic ids"
+        )
+      end
       topic_ids = params[:topic_ids].map { |t| t.to_i }
     elsif params[:filter] == 'unread'
       tq = TopicQuery.new(current_user)
@@ -970,7 +975,18 @@ class TopicsController < ApplicationController
         end
       end
 
-    dismissed_topic_ids = DismissTopics.new(current_user, topic_scope).perform!
+    if params[:topic_ids].present?
+      unless Array === params[:topic_ids]
+        raise Discourse::InvalidParameters.new(
+          "Expecting topic_ids to contain a list of topic ids"
+        )
+      end
+
+      topic_ids = params[:topic_ids].map { |t| t.to_i }
+      topic_scope = topic_scope.where(id: topic_ids)
+    end
+
+    dismissed_topic_ids = TopicsBulkAction.new(current_user, [topic_scope.pluck(:id)], type: "dismiss_topics").perform!
     TopicTrackingState.publish_dismiss_new(current_user.id, topic_ids: dismissed_topic_ids)
 
     render body: nil
diff --git a/app/services/dismiss_topics.rb b/app/services/dismiss_topics.rb
deleted file mode 100644
index 595fdf92d1d..00000000000
--- a/app/services/dismiss_topics.rb
+++ /dev/null
@@ -1,45 +0,0 @@
-# frozen_string_literal: true
-
-class DismissTopics
-  def initialize(user, topics_scope)
-    @user = user
-    @topics_scope = topics_scope
-  end
-
-  def perform!
-    DismissedTopicUser.insert_all(rows) if rows.present?
-    @rows.map { |row| row[:topic_id] }
-  end
-
-  private
-
-  def rows
-    @rows ||= @topics_scope
-      .joins("LEFT JOIN topic_users ON topic_users.topic_id = topics.id AND topic_users.user_id = #{@user.id}")
-      .where("topics.created_at >= ?", since_date)
-      .where("topic_users.last_read_post_number IS NULL")
-      .where("topics.archetype <> ?", Archetype.private_message)
-      .order("topics.created_at DESC")
-      .limit(SiteSetting.max_new_topics).map do |topic|
-      {
-        topic_id: topic.id,
-        user_id: @user.id,
-        created_at: Time.zone.now
-      }
-    end
-  end
-
-  def since_date
-    new_topic_duration_minutes = @user.user_option&.new_topic_duration_minutes || SiteSetting.default_other_new_topic_duration_minutes
-    setting_date =
-      case new_topic_duration_minutes
-      when User::NewTopicDuration::LAST_VISIT
-        @user.previous_visit_at || @user.created_at
-      when User::NewTopicDuration::ALWAYS
-        @user.created_at
-      else
-        new_topic_duration_minutes.minutes.ago
-      end
-    [setting_date, @user.created_at, Time.at(SiteSetting.min_new_topics_time).to_datetime].max
-  end
-end
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index 4ced6006644..a8f20973066 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -2332,10 +2332,13 @@ en:
         delete: "Delete Topics"
         dismiss: "Dismiss"
         dismiss_read: "Dismiss all unread"
+        dismiss_read_with_selected: "Dismiss %{count} unread"
         dismiss_button: "Dismiss…"
+        dismiss_button_with_selected: "Dismiss (%{count})…"
         dismiss_tooltip: "Dismiss just new posts or stop tracking topics"
         also_dismiss_topics: "Stop tracking these topics so they never show up as unread for me again"
         dismiss_new: "Dismiss New"
+        dismiss_new_with_selected: "Dismiss New (%{count})"
         toggle: "toggle bulk selection of topics"
         actions: "Bulk Actions"
         change_category: "Set Category"
diff --git a/lib/topics_bulk_action.rb b/lib/topics_bulk_action.rb
index a7c23ee8e52..4a9418853f2 100644
--- a/lib/topics_bulk_action.rb
+++ b/lib/topics_bulk_action.rb
@@ -14,7 +14,7 @@ class TopicsBulkAction
     @operations ||= %w(change_category close archive change_notification_level
                        reset_read dismiss_posts delete unlist archive_messages
                        move_messages_to_inbox change_tags append_tags remove_tags
-                       relist)
+                       relist dismiss_topics)
   end
 
   def self.register_operation(name, &block)
@@ -26,7 +26,7 @@ class TopicsBulkAction
     raise Discourse::InvalidParameters.new(:operation) unless TopicsBulkAction.operations.include?(@operation[:type])
     # careful these are private methods, we need send
     send(@operation[:type])
-    @changed_ids
+    @changed_ids.sort
   end
 
   private
@@ -81,6 +81,24 @@ class TopicsBulkAction
     @changed_ids.concat @topic_ids
   end
 
+  def dismiss_topics
+    rows = Topic.where(id: @topic_ids)
+      .joins("LEFT JOIN topic_users ON topic_users.topic_id = topics.id AND topic_users.user_id = #{@user.id}")
+      .where("topics.created_at >= ?", dismiss_topics_since_date)
+      .where("topic_users.last_read_post_number IS NULL")
+      .where("topics.archetype <> ?", Archetype.private_message)
+      .order("topics.created_at DESC")
+      .limit(SiteSetting.max_new_topics).map do |topic|
+      {
+        topic_id: topic.id,
+        user_id: @user.id,
+        created_at: Time.zone.now
+      }
+    end
+    DismissedTopicUser.insert_all(rows) if rows.present?
+    @changed_ids = rows.map { |row| row[:topic_id] }
+  end
+
   def reset_read
     PostTiming.destroy_for(@user.id, @topic_ids)
   end
@@ -211,4 +229,18 @@ class TopicsBulkAction
     @topics ||= Topic.where(id: @topic_ids)
   end
 
+  def dismiss_topics_since_date
+    new_topic_duration_minutes = @user.user_option&.new_topic_duration_minutes || SiteSetting.default_other_new_topic_duration_minutes
+    setting_date =
+      case new_topic_duration_minutes
+      when User::NewTopicDuration::LAST_VISIT
+        @user.previous_visit_at || @user.created_at
+      when User::NewTopicDuration::ALWAYS
+        @user.created_at
+      else
+        new_topic_duration_minutes.minutes.ago
+      end
+    [setting_date, @user.created_at, Time.at(SiteSetting.min_new_topics_time).to_datetime].max
+  end
+
 end
diff --git a/spec/components/topics_bulk_action_spec.rb b/spec/components/topics_bulk_action_spec.rb
index 184a1c91cd1..c096a5a19f6 100644
--- a/spec/components/topics_bulk_action_spec.rb
+++ b/spec/components/topics_bulk_action_spec.rb
@@ -5,6 +5,70 @@ require 'rails_helper'
 describe TopicsBulkAction do
   fab!(:topic) { Fabricate(:topic) }
 
+  describe type: "dismiss_topics" do
+    fab!(:user) { Fabricate(:user, created_at: 1.days.ago) }
+    fab!(:category) { Fabricate(:category) }
+    fab!(:topic2) { Fabricate(:topic, category: category, created_at: 60.minutes.ago) }
+    fab!(:topic3) { Fabricate(:topic, category: category, created_at: 120.minutes.ago) }
+
+    before do
+      topic.destroy!
+    end
+
+    it 'dismisses two topics' do
+      expect { TopicsBulkAction.new(user, [Topic.all.pluck(:id)], type: "dismiss_topics").perform! }.to change { DismissedTopicUser.count }.by(2)
+    end
+
+    it 'returns dismissed topic ids' do
+      expect(TopicsBulkAction.new(user, [Topic.all.pluck(:id)], type: "dismiss_topics").perform!.sort).to match_array(
+        [topic2.id, topic3.id]
+      )
+    end
+
+    it 'respects max_new_topics limit' do
+      SiteSetting.max_new_topics = 1
+      expect do
+        TopicsBulkAction.new(user, [Topic.all.pluck(:id)], type: "dismiss_topics").perform!
+      end.to change { DismissedTopicUser.count }.by(1)
+
+      dismissed_topic_user = DismissedTopicUser.last
+
+      expect(dismissed_topic_user.user_id).to eq(user.id)
+      expect(dismissed_topic_user.topic_id).to eq(topic2.id)
+      expect(dismissed_topic_user.created_at).not_to be_nil
+    end
+
+    it 'respects seen topics' do
+      Fabricate(:topic_user, user: user, topic: topic2, last_read_post_number: 1)
+      Fabricate(:topic_user, user: user, topic: topic3, last_read_post_number: 1)
+      expect do
+        TopicsBulkAction.new(user, [Topic.all.pluck(:id)], type: "dismiss_topics").perform!
+      end.to change { DismissedTopicUser.count }.by(0)
+    end
+
+    it 'dismisses when topic user without last_read_post_number' do
+      Fabricate(:topic_user, user: user, topic: topic2, last_read_post_number: nil)
+      Fabricate(:topic_user, user: user, topic: topic3, last_read_post_number: nil)
+      expect do
+        TopicsBulkAction.new(user, [Topic.all.pluck(:id)], type: "dismiss_topics").perform!
+      end.to change { DismissedTopicUser.count }.by(2)
+    end
+
+    it 'respects new_topic_duration_minutes' do
+      user.user_option.update!(new_topic_duration_minutes: 70)
+
+      expect do
+        TopicsBulkAction.new(user, [Topic.all.pluck(:id)], type: "dismiss_topics").perform!
+      end.to change { DismissedTopicUser.count }.by(1)
+
+      dismissed_topic_user = DismissedTopicUser.last
+
+      expect(dismissed_topic_user.user_id).to eq(user.id)
+      expect(dismissed_topic_user.topic_id).to eq(topic2.id)
+      expect(dismissed_topic_user.created_at).not_to be_nil
+    end
+  end
+
   describe "dismiss_posts" do
     it "dismisses posts" do
       post1 = create_post
diff --git a/spec/requests/topics_controller_spec.rb b/spec/requests/topics_controller_spec.rb
index 684a8608493..79f6be9be59 100644
--- a/spec/requests/topics_controller_spec.rb
+++ b/spec/requests/topics_controller_spec.rb
@@ -2801,6 +2801,17 @@ RSpec.describe TopicsController do
         }
       end
 
+      it "raises an error if topic_ids is provided and it is not an array" do
+        put "/topics/bulk.json", params: {
+          topic_ids: "1", operation: operation
+        }
+        expect(response.parsed_body["errors"].first).to match(/Expecting topic_ids to contain a list/)
+        put "/topics/bulk.json", params: {
+          topic_ids: [1], operation: operation
+        }
+        expect(response.parsed_body["errors"]).to eq(nil)
+      end
+
       it "respects the tracked parameter" do
         # untracked topic
         CategoryUser.set_notification_level_for_category(user,
@@ -2975,7 +2986,7 @@ RSpec.describe TopicsController do
       it 'dismisses topics for main category and subcategories' do
         sign_in(user)
 
-        TopicTrackingState.expects(:publish_dismiss_new).with(user.id, topic_ids: [subcategory_topic.id, category_topic.id])
+        TopicTrackingState.expects(:publish_dismiss_new).with(user.id, topic_ids: [category_topic.id, subcategory_topic.id])
 
         put "/topics/reset-new.json?category_id=#{category.id}&include_subcategories=true"
 
@@ -3011,6 +3022,69 @@ RSpec.describe TopicsController do
         expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id)).to eq([tag_and_category_topic.id])
       end
     end
+
+    context "specific topics" do
+      fab!(:topic2) { Fabricate(:topic) }
+      fab!(:topic3) { Fabricate(:topic) }
+
+      it "updates the `new_since` date" do
+        sign_in(user)
+
+        old_date = 2.years.ago
+        user.user_stat.update_column(:new_since, old_date)
+        user.update_column(:created_at, old_date)
+
+        TopicTrackingState.expects(:publish_dismiss_new).with(user.id, topic_ids: [topic2.id, topic3.id]).at_least_once
+
+        put "/topics/reset-new.json", { params: { topic_ids: [topic2.id, topic3.id] } }
+        expect(response.status).to eq(200)
+        user.reload
+        expect(user.user_stat.new_since.to_date).not_to eq(old_date.to_date)
+        expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id)).to match_array([topic2.id, topic3.id])
+      end
+
+      it "raises an error if topic_ids is provided and it is not an array" do
+        sign_in(user)
+        put "/topics/reset-new.json", params: { topic_ids: topic2.id }
+        expect(response.parsed_body["errors"].first).to match(/Expecting topic_ids to contain a list/)
+        put "/topics/reset-new.json", params: { topic_ids: [topic2.id] }
+        expect(response.parsed_body["errors"]).to eq(nil)
+      end
+
+      describe "when tracked param is true" do
+        it "does not update user_stat.new_since and does not dismiss untracked topics" do
+          sign_in(user)
+
+          old_date = 2.years.ago
+          user.user_stat.update_column(:new_since, old_date)
+
+          put "/topics/reset-new.json?tracked=true", { params: { topic_ids: [topic2.id, topic3.id] } }
+          expect(response.status).to eq(200)
+          user.reload
+          expect(user.user_stat.new_since.to_date).to eq(old_date.to_date)
+          expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id)).to be_empty
+        end
+
+        it "creates topic user records for each unread topic" do
+          sign_in(user)
+          user.user_stat.update_column(:new_since, 2.years.ago)
+
+          tracked_category = Fabricate(:category)
+          CategoryUser.set_notification_level_for_category(user,
+                                                           NotificationLevels.all[:tracking],
+                                                           tracked_category.id)
+          tracked_topic = create_post.topic
+          tracked_topic.update!(category_id: tracked_category.id)
+          topic2.update!(category_id: tracked_category.id)
+
+          create_post # This is a new post, but is not tracked so a record will not be created for it
+          expect do
+            put "/topics/reset-new.json?tracked=true", { params: { topic_ids: [tracked_topic.id, topic2.id, topic3.id] } }
+          end.to change { DismissedTopicUser.where(user_id: user.id).count }.by(2)
+          expect(DismissedTopicUser.where(user_id: user.id).pluck(:topic_id)).to match_array([tracked_topic.id, topic2.id])
+        end
+      end
+    end
   end
 
   describe '#feature_stats' do
diff --git a/spec/services/dismiss_topics_spec.rb b/spec/services/dismiss_topics_spec.rb
deleted file mode 100644
index ba640ebb1ef..00000000000
--- a/spec/services/dismiss_topics_spec.rb
+++ /dev/null
@@ -1,55 +0,0 @@
-# frozen_string_literal: true
-
-require 'rails_helper'
-
-describe DismissTopics do
-  fab!(:user) { Fabricate(:user, created_at: 1.days.ago) }
-  fab!(:category) { Fabricate(:category) }
-  fab!(:topic1) { Fabricate(:topic, category: category, created_at: 60.minutes.ago) }
-  fab!(:topic2) { Fabricate(:topic, category: category, created_at: 120.minutes.ago) }
-
-  describe '#perform!' do
-    it 'dismisses two topics' do
-      expect { described_class.new(user, Topic.all).perform! }.to change { DismissedTopicUser.count }.by(2)
-    end
-
-    it 'returns dismissed topic ids' do
-      expect(described_class.new(user, Topic.all).perform!.sort).to eq([topic1.id, topic2.id])
-    end
-
-    it 'respects max_new_topics limit' do
-      SiteSetting.max_new_topics = 1
-      expect { described_class.new(user, Topic.all).perform! }.to change { DismissedTopicUser.count }.by(1)
-
-      dismissed_topic_user = DismissedTopicUser.last
-
-      expect(dismissed_topic_user.user_id).to eq(user.id)
-      expect(dismissed_topic_user.topic_id).to eq(topic1.id)
-      expect(dismissed_topic_user.created_at).not_to be_nil
-    end
-
-    it 'respects seen topics' do
-      Fabricate(:topic_user, user: user, topic: topic1, last_read_post_number: 1)
-      Fabricate(:topic_user, user: user, topic: topic2, last_read_post_number: 1)
-      expect { described_class.new(user, Topic.all).perform! }.to change { DismissedTopicUser.count }.by(0)
-    end
-
-    it 'dismisses when topic user without last_read_post_number' do
-      Fabricate(:topic_user, user: user, topic: topic1, last_read_post_number: nil)
-      Fabricate(:topic_user, user: user, topic: topic2, last_read_post_number: nil)
-      expect { described_class.new(user, Topic.all).perform! }.to change { DismissedTopicUser.count }.by(2)
-    end
-
-    it 'respects new_topic_duration_minutes' do
-      user.user_option.update!(new_topic_duration_minutes: 70)
-
-      expect { described_class.new(user, Topic.all).perform! }.to change { DismissedTopicUser.count }.by(1)
-
-      dismissed_topic_user = DismissedTopicUser.last
-
-      expect(dismissed_topic_user.user_id).to eq(user.id)
-      expect(dismissed_topic_user.topic_id).to eq(topic1.id)
-      expect(dismissed_topic_user.created_at).not_to be_nil
-    end
-  end
-end