Navigating from notifications does not load the extension.

[parasharrajat]

Possibly because, of page, the load is never fired in such cased and thus contentscripts are failed to load by the browser. The browser depends on page load...

Possible Solution

1. Dynamically inject the scripts when tab URL changes. it could be hectic to do as we will have to listen for all URL changes on all the tabs but seems like the optimized solution.
2. inject the content scripts on all of the GitHub pages but hide the UI until the URL matches the correct path. The problem with this is that extra extension UI is injected for all pages of GitHub.