This is a pretty good extension but there can be some improvements. I like that it gets rid of the primary issue with Twitter, ie the "For You" page and random nonsense.

However, I still am seeing the "Discover More" area, which is annoying. But the biggest concern is this extension is messing with my "Find in Page," (⌘+F), which Firefox browser offers and that is causing issues with me finding things. Overall, this is good but still needs tweaks.