Add warning about extension storage being disable

Fixes issues with Tor and Mullvad browser
Fixes #1894

src/background.ts

@@ -121,7 +121,7 @@ chrome.runtime.onInstalled.addListener(function () {
         const userID = Config.config.userID;
 
         // If there is no userID, then it is the first install.
-        if (!userID){
+        if (!userID && !Config.local.alreadyInstalled){
             //open up the install page
             chrome.tabs.create({url: chrome.extension.getURL("/help/index.html")});
 
@@ -129,6 +129,7 @@ chrome.runtime.onInstalled.addListener(function () {
             const newUserID = generateUserID();
             //save this UUID
             Config.config.userID = newUserID;
+            Config.local.alreadyInstalled = true;
 
             // Don't show update notification
             Config.config.categoryPillUpdate = true;

src/config.ts

@@ -137,6 +137,9 @@ interface SBStorage {
     /* VideoID prefixes to UUID prefixes */
     downvotedSegments: Record<VideoID & HashedValue, VideoDownvotes>;
     navigationApiAvailable: boolean;
+    
+    // Used when sync storage disbaled
+    alreadyInstalled: boolean;
 }
 
 class ConfigClass extends ProtoConfig<SBConfig, SBStorage> {
@@ -456,7 +459,8 @@ const syncDefaults = {
 
 const localDefaults = {
     downvotedSegments: {},
-    navigationApiAvailable: null
+    navigationApiAvailable: null,
+    alreadyInstalled: false
 };
 
 const Config = new ConfigClass(syncDefaults, localDefaults, migrateOldSyncFormats);