Disable WebWorkers by default

www/common/application_config_internal.js

@@ -119,5 +119,12 @@ define(function() {
     // You can use config.afterLogin to import these values in the users' drive.
     //config.disableProfile = true;
 
+    // Disable the use of webworkers and sharedworkers in CryptPad.
+    // Workers allow us to run the websockets connection and open the user drive in a separate thread.
+    // SharedWorkers allow us to load only one websocket and one user drive for all the browser tabs,
+    // making it much faster to open new tabs.
+    // Warning: This is an experimental feature. It will be enabled by default once we're sure it's stable.
+    config.disableWorkers = true;
+
     return config;
 });

www/common/cryptpad-common.js

@@ -906,7 +906,11 @@ define([
 
             var msgEv = Util.mkEvent();
             var postMsg, worker;
-            var noWorker = false;
+            var noWorker = AppConfig.disableWorkers || false;
+            if (localStorage.CryptPad_noWorkers) {
+                noWorker = localStorage.CryptPad_noWorkers === '1';
+                console.error('WebWorker/SharedWorker state forced to ' + !noWorker);
+            }
             Nthen(function (waitFor2) {
                 if (Worker) {
                     var w = waitFor2();