What happened to the Tab Center Redux addon?! This addon has had a massive impact on my Firefox user experience. I was setting up a new machine today when I realized the addon is completely missing from my sync’d Firefox. After some digging, the addon page seems to be gone: https://addons.mozilla.org/firefox/addon/tab-center-redux/
Tab Center Reborn seems to be a continuation of the redux addon, development went stale? From the screenshots, it looks similar and maybe a little cleaner too, but Redux going completely MIA was a bit unexpected. I wish Firefox better informed you when something like this happens.