fixes #90

extension/common.js

@@ -89,6 +89,7 @@ chrome.storage.local.get(prefs, ps => {
     });
 
     // update prefs.ua from the managed storage
+    try {
       chrome.storage.managed.get({
         ua: ''
       }, rps => {
@@ -101,6 +102,10 @@ chrome.storage.local.get(prefs, ps => {
           ua.update(undefined, undefined, DCSI);
         }
       });
+    }
+    catch (e) {
+      ua.update(undefined, undefined, DCSI);
+    }
   });
 
   if (chrome.browserAction.setBadgeBackgroundColor) { // FF for Android
@@ -409,7 +414,6 @@ function match({url, tabId, cookieStoreId = DCSI}) {
   s = s || expand.rules[key];
   // use '*' when the hostname specific key is not found
   s = s || expand.rules['*'];
-  console.log(s);
   // if s is an array select a random string
   if (Array.isArray(s)) {
     s = s[Math.floor(Math.random() * s.length)];

extension/data/popup/index.js

@@ -146,7 +146,8 @@ function update(ua) {
       else {
         throw Error('OS is not found');
       }
-    }).finally(() => {
+    // FF 55.0 does not support finally
+    }).catch(() => {}).then(() => {
       parent.dataset.loading = false;
     });
 }