I still need to test-drive this extension, but if it keeps what it seems to promise, brilliant — especially since I've had a number of issues with Twitter's web browser app under Firefox.

Corresction: -2 stars (after 5 min.): why are emojis available in original tweets but not in replies, retweets, et al.?

It's neat but it loses my bottom scroll bar in Firefox 66.0.3 for Linux Mint.

needs a clear all columns button somewhere