[PM-9455] FireFox back handling (#10867)

* Refactor `POPUP_VIEW_MEMORY` to use `disk` rather than memory for the browser extension.

- When FireFox opens the popup in an standalone window memory is lost, thus causing the `popup-route-history` to be lost and back navigation ceases to work

* spelling

* revert state definition change

* add `onUpdated` event for firefox

* rework observable handling

* remove unneeded `from`

apps/browser/src/platform/services/popup-view-cache-background.service.ts

@@ -1,4 +1,4 @@
-import { switchMap, merge, delay, filter, concatMap, map } from "rxjs";
+import { switchMap, merge, delay, filter, concatMap, map, first, of } from "rxjs";
 
 import { CommandDefinition, MessageListener } from "@bitwarden/common/platform/messaging";
 import {
@@ -61,7 +61,18 @@ export class PopupViewCacheBackgroundService {
     merge(
       // on tab changed, excluding extension tabs
       fromChromeEvent(chrome.tabs.onActivated).pipe(
-        switchMap(([tabInfo]) => BrowserApi.getTab(tabInfo.tabId)),
+        switchMap((tabs) => BrowserApi.getTab(tabs[0].tabId)),
+        switchMap((tab) => {
+          // FireFox sets the `url` to "about:blank" and won't populate the `url` until the `onUpdated` event
+          if (tab.url !== "about:blank") {
+            return of(tab);
+          }
+
+          return fromChromeEvent(chrome.tabs.onUpdated).pipe(
+            first(),
+            switchMap(([tabId]) => BrowserApi.getTab(tabId)),
+          );
+        }),
         map((tab) => tab.url || tab.pendingUrl),
         filter((url) => !url.startsWith(chrome.runtime.getURL(""))),
       ),

libs/common/src/platform/state/global-state.provider.ts

@@ -2,7 +2,7 @@ import { GlobalState } from "./global-state";
 import { KeyDefinition } from "./key-definition";
 
 /**
- * A provider for geting an implementation of global state scoped to the given key.
+ * A provider for getting an implementation of global state scoped to the given key.
  */
 export abstract class GlobalStateProvider {
   /**