diff --git a/extensions/chromium/runet-censorship-bypass/gulpfile.js b/extensions/chromium/runet-censorship-bypass/gulpfile.js
index 9f4b6d2..c1c1b55 100644
--- a/extensions/chromium/runet-censorship-bypass/gulpfile.js
+++ b/extensions/chromium/runet-censorship-bypass/gulpfile.js
@@ -19,12 +19,6 @@ const templatePlugin = (context) => through.obj(function(file, encoding, cb) {
       return cb(new PluginError(PluginName, 'Streams not supported!'));
     } else if (file.isBuffer()) {
 
-      const stringsContext = new Proxy(context, {
-        get: function(target, prop) {
-          return target[prop] || '';
-        },
-      });
-
       const {keys, values} = Object.entries(context).reduce( (acc, [key, value]) => {
 
         acc.keys.push(key);
@@ -56,7 +50,7 @@ gulp.task('clean', function() {
 });
 
 const fullContext = {
-  version: '0.20',
+  version: '0.21',
   nameSuffixEn: '',
   nameSuffixRu: '',
 };
diff --git a/extensions/chromium/runet-censorship-bypass/src/extension-common/13-http-lib.js b/extensions/chromium/runet-censorship-bypass/src/extension-common/13-http-lib.js
index 444f767..4fbe0ec 100644
--- a/extensions/chromium/runet-censorship-bypass/src/extension-common/13-http-lib.js
+++ b/extensions/chromium/runet-censorship-bypass/src/extension-common/13-http-lib.js
@@ -31,7 +31,7 @@
               (res.headers.get('Last-Modified') || wasModified)
           );
         },
-        errorsLib.clarifyThen(checkCon, (err) => cb(err, wasModifed))
+        errorsLib.clarifyThen(checkCon, (err) => cb(err, wasModified))
       );
 
     },
diff --git a/extensions/chromium/runet-censorship-bypass/src/extension-common/17-sync-pac-script-with-pac-provider-api.js b/extensions/chromium/runet-censorship-bypass/src/extension-common/17-sync-pac-script-with-pac-provider-api.js
index ba25def..559873b 100644
--- a/extensions/chromium/runet-censorship-bypass/src/extension-common/17-sync-pac-script-with-pac-provider-api.js
+++ b/extensions/chromium/runet-censorship-bypass/src/extension-common/17-sync-pac-script-with-pac-provider-api.js
@@ -93,7 +93,7 @@
       'Getting IPs for PAC hosts...',
       cb
     );
-    window.utils.fireEvent('ip-to-host-update-all', throwIfError);
+    window.utils.fireEvent('ip-to-host-update-all', () => {/* Swallow. */});
     cb();
 
   };
@@ -500,11 +500,15 @@
 
       // UPDATE & MIGRATION
       const key = antiCensorRu._currentPacProviderKey;
-      if (
-        key !== null &&
-        !Object.keys(antiCensorRu.pacProviders).includes(key)
-      ) {
-        antiCensorRu._currentPacProviderKey = 'Антицензорити';
+      if (key !== null) {
+        const ifVeryOld = !Object.keys(antiCensorRu.pacProviders).includes(key);
+        const ifWasForced = localStorage.getItem('provider-backup');
+        if ( ifVeryOld || !ifWasForced ) {
+          if (!ifWasForced) {
+            localStorage.setItem('provider-backup', antiCensorRu._currentPacProviderKey);
+          }
+          antiCensorRu._currentPacProviderKey = 'Антизапрет';
+        }
       }
       console.log('Extension updated.');