Merge pull request rancher#12561 from moio/no_webworker_polyfill_210

 [2.10 backport] Avoid embedding web-worker polyfill

shell/vue.config.js

@@ -131,11 +131,11 @@ const instrumentCode = () => {
 };
 
 const getLoaders = (SHELL_ABS) => [
-  // Ensure there is a fallback for browsers that don't support web workers
+  // no fallback for pre-2013 browsers https://caniuse.com/webworkers
   {
     test:    /web-worker.[a-z-]+.js/i,
     loader:  'worker-loader',
-    options: { inline: 'fallback' },
+    options: { inline: 'no-fallback' },
   },
   // Handler for csv files (e.g. ec2 instance data)
   {