Screenpages is a free browser extension that will allow you to monitor the current URL of a website in real-time. It also works as a notification for any URL that you visit that is not the one you are currently testing.

The extension will let you know if you navigate away from the domain that you are currently testing. This will help you spot any unwanted redirects or navigations. It also lets you know if you are browsing from a test website to a production website.

This browser extension is very useful for testing the URLs of websites and for notifying you if the URL that you are visiting does not contain the URL that you are currently testing. It also provides a feature to notify you when you navigate to a URL that doesn't contain the string you have selected in the select box.