diff --git a/.discourse-compatibility b/.discourse-compatibility
index 0867765..72fcf3f 100644
--- a/.discourse-compatibility
+++ b/.discourse-compatibility
@@ -1,3 +1,4 @@
+< 2025.12.0-latest: 3fe319b82c9146b15743537d38fdff753c35dfdb
 < 3.6.0.beta2-latest: 68e88152d28189b3c22ec0011729fd765cf5c43a
 < 3.6.0.beta1-dev: 232ac13322c390ee7646007b91982e7617dccb90
 < 3.5.0.beta8-dev: 76183351645aea8d0837f602d9f3ab8c89994ed6
diff --git a/assets/javascripts/discourse/api-initializers/intitialize-whos-online-indicators.gjs b/assets/javascripts/discourse/api-initializers/intitialize-whos-online-indicators.gjs
index 7a05c4e..57a712a 100644
--- a/assets/javascripts/discourse/api-initializers/intitialize-whos-online-indicators.gjs
+++ b/assets/javascripts/discourse/api-initializers/intitialize-whos-online-indicators.gjs
@@ -1,8 +1,5 @@
 import bodyClass from "discourse/helpers/body-class";
 import { apiInitializer } from "discourse/lib/api";
-import { withSilencedDeprecations } from "discourse/lib/deprecated";
-
-const PLUGIN_ID = "whos-online";
 
 export default apiInitializer((api) => {
   const siteSettings = api.container.lookup("service:site-settings");
@@ -93,61 +90,4 @@ function customizePost(api) {
       return value;
     }
   );
-
-  withSilencedDeprecations("discourse.post-stream-widget-overrides", () =>
-    customizeWidgetPost(api)
-  );
-}
-
-function customizeWidgetPost(api) {
-  api.modifyClass("component:scrolling-post-stream", {
-    pluginId: PLUGIN_ID,
-
-    didInsertElement() {
-      this._super();
-      this.appEvents.on("whosonline:changed", this, this._whosOnlineCallback);
-    },
-
-    willDestroyElement() {
-      this.appEvents.off("whosonline:changed", this, this._whosOnlineCallback);
-    },
-
-    _whosOnlineCallback(changedUserIds) {
-      changedUserIds.forEach((id) => {
-        let postIds = this.attrs.posts.value
-          .filter(({ user_id }) => {
-            return user_id === id;
-          })
-          .map((post) => post.id);
-        postIds.forEach((postId) => {
-          this.dirtyKeys.keyDirty(`post-${postId}`);
-          this.dirtyKeys.keyDirty(`post-${postId}-avatar-${id}`, {
-            onRefresh: "updateOnline",
-          });
-        });
-      });
-      this.queueRerender();
-    },
-  });
-
-  api.reopenWidget("post-avatar", {
-    buildKey: (attrs) => `post-${attrs.id}-avatar-${attrs.user_id}`,
-    isUserOnline(userId) {
-      return this.register.lookup("service:whos-online").isUserOnline(userId);
-    },
-    defaultState(attrs) {
-      return {
-        online: this.isUserOnline(attrs.user_id),
-      };
-    },
-    updateOnline() {
-      this.state.online = this.isUserOnline(this.attrs.user_id);
-    },
-    buildClasses(attrs, state) {
-      if (state.online) {
-        return "user-online";
-      }
-      return [];
-    },
-  });
 }
diff --git a/assets/javascripts/discourse/services/whos-online.js b/assets/javascripts/discourse/services/whos-online.js
index de0400f..03bd266 100755
--- a/assets/javascripts/discourse/services/whos-online.js
+++ b/assets/javascripts/discourse/services/whos-online.js
@@ -3,7 +3,6 @@ import Site from "discourse/models/site";
 
 export default class WhosOnlineService extends Service {
   @service presence;
-  @service appEvents;
 
   #channel;
 
@@ -15,9 +14,6 @@ export default class WhosOnlineService extends Service {
     if (this.enabled) {
       this.#channel.subscribe(Site.currentProp("whos_online_state"));
     }
-
-    // TODO (glimmer-post-stream): remove this observer when removing the legacy widget code
-    this.addObserver("users.[]", this, this._usersChanged);
   }
 
   get users() {
@@ -32,20 +28,6 @@ export default class WhosOnlineService extends Service {
     return this.#channel?.countOnly || 0;
   }
 
-  // TODO (glimmer-post-stream): remove this function when removing the legacy widget code
-  _usersChanged() {
-    const currentUserIds = new Set(this.users?.map((u) => u.id) || []);
-    const prevUserIds = this._prevUserIds || new Set([]);
-
-    const enteredUsers = [...currentUserIds].filter((x) => !prevUserIds.has(x));
-    const leftUsers = [...prevUserIds].filter((x) => !currentUserIds.has(x));
-    const changedUsers = [...enteredUsers, ...leftUsers];
-
-    if (changedUsers.length > 0) {
-      this.appEvents.trigger("whosonline:changed", changedUsers);
-    }
-  }
-
   get enabled() {
     const anonAndLoginRequired =
       !this.currentUser && this.siteSettings.login_required;