Disclaimer: This article covers Firefox v89, and there are some improvements today. After the release of Firefox v89 in 2021, there was a tremendous amount of controversy(reddit, HN) over the UI, and this repository quickly gained popularity for addressing most of the issues. Waterfox and Floorp browsers also set my theme as the default. Between writing that last post and hesitating to write it, time has passed, it's 2023, and Mozilla has decided to end support for Windows 7 and Windows 8. Firef...