Block Unreachable Scripts is a free Chrome extension that monitors failed JavaScript requests. If the browser receives a request from a source it can't reach, it will display a dialog to allow the site to load or not.

While the Chrome browser checks the URL and network connection, it won't load the requested resource, because it doesn't exist.

If the browser detects that the server it is contacting is no longer reachable, it will alert you by showing a message in the browser's URL bar.

How to use Block Unreachable Scripts

1. Open Block Unreachable Scripts in Chrome

2. Click on the "Block unreachable scripts" icon