Doesn't work at all in 136.0.

20250106 update: a day later and it's not working at all anymore ☹

20250105
After much frustration and searching, I looked for two extensions mentioned in an article on GB Times ( gbtimes dot com/how-to-see-all-comments-on-facebook/).
I couldn't find "Facebook Comment Viewer" or "Comment Uncover" anywhere, but the Comment Uncover search lead me to "All: Show All Comments for Facebook, by Neatrat" which works perfectly. I'm even finding days-old posts that I completely missed. The negative issues mentioned by others don't seem to be happening to me.

Same issue as other commenter: with this plugin it switches to 'Top Comments' but not 'All Comments'
Hopefully the fix is as simple as editing a few lines?

Getting there... with this plugin installed I get 'Top Comments' instead of 'Most Relevant' by default. So the add-on has an effect, just not the 'All Comments' I was hoping for.

Not working, please fix

doesnt work

(Feb 23, 2023) Facebook is annoying as hell, and they recently introduced more changes that broke this plugin. Hopefully the developer comes out with a fix!

Doesn't work

22/11/2022 - Not working

This add-on doesn't charge Facebook Most Relevant to All Comments. All it does is is enlarge the text of the viewing choices. Maybe there is a conflict with FB Purity of a FB code change

Makes the font of "Like", "Reply" and posting time twice as big as everything else - and as of August 1, 2022, the extension no longer has any effect at all on comments sorting order.

Super, das spart mir wertvolle Zeit und Klicks (weil ich kein Mausschubser bin, old school! ;-) )!

A must have since facebook's acting like an horrible capitalist company (weird right ?)