..

app/src/main/assets/extensions/my_extension/inject-viewport.js

@@ -0,0 +1,9 @@
+(function() {
+    var meta = document.querySelector('meta[name=viewport]');
+    if (!meta) {
+        meta = document.createElement('meta');
+        meta.name = 'viewport';
+        document.head.appendChild(meta);
+    }
+    meta.setAttribute('content', 'width=device-width, initial-scale=1.0');
+})();

app/src/main/assets/extensions/my_extension/manifest.json

@@ -15,7 +15,7 @@
     {
       "run_at": "document_end",
       "matches": ["<all_urls>"],
-      "js": ["messaging.js"]
+      "js": ["messaging.js","inject-viewport.js"]
     }
   ],
   "permissions": [

app/src/main/assets/extensions/my_extension/messaging.js

@@ -414,20 +414,21 @@ var time2 = null
 function gotoNext() {
     clearTimeout(time1)
     try{
-       console.log("targetUrl :: " + targetUrl);
-       time2 = setTimeout(function () {
-           clearTimeout(time2)
-           document.querySelector('[class="btn-group"]').querySelectorAll('a').forEach(function(e){
-               if(e.hasAttribute("href") &&
-                   (
-                       (e.getAttribute("href").search("page=2") > -1 && location.href.search("page") < 0) ||
-                       (e.getAttribute("href").search("page=3") > -1 && location.href.search("page=2") > 0)
-                   )) {
-                   e.click()
-               }
-           })
-       }, 5000);
-
+        console.log("targetUrl :: " + targetUrl);
+        if (document.querySelector('[class="btn-group"]')) {
+            time2 = setTimeout(function () {
+                clearTimeout(time2)
+                document.querySelector('[class="btn-group"]').querySelectorAll('a').forEach(function(e){
+                    if(e.hasAttribute("href") &&
+                        (
+                            (e.getAttribute("href").search("page=2") > -1 && location.href.search("page") < 0) ||
+                            (e.getAttribute("href").search("page=3") > -1 && location.href.search("page=2") > 0)
+                        )) {
+                        e.click()
+                    }
+                })
+            }, 5000);
+        }
     } catch (e) {
 
     }