Be careful with old versions!
These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.
Used a different function to retrieve URLs, original function was incorrect and did not work correctly on some websites such as Twitter due to the way links are formatted.
Changed the URL that the extension opens as the existing one was for an old version of the application so the server simply redirected to the correct URL, this eliminates the need for the redirect.