Unfortunately this extension is dead on arrival. It is a shame because now I have to go dig into the css and do all that nonsense to increase the size of the font in the FF menu bar. Aye yi yi what a pain in the arse. Adjusting fonts should not even require leaving the FF UI. I don't know why Mozilla FF doesn't make a user friendly page to adjust fonts. It's just dumb. But this extension is not going to fix it cuz it's broke too :(

"It could be useful, but unfortunately, it doesn't work (at least not, with FF v.139.0)"

Not working at all. Very long manual probably outdated.

Quantum以降のFirefoxには対応していないようで、紹介されている説明の殆どの機能は削られています。

After you instal it (right click the add button, save to file, then instal from file) and click on options, there is a message that it's mostly non functional and asks you to complete a survey about what features you want etc as they're considering whether to update or discontinue it.
I suggested they put that in the addon download page!

Theres only 2 buttons: background colour and text colour I didn't try them.

Does not work and cannot resize fonts as admitted by authors.

Doesn't work. Waste of time

mantap

Es arbeitet nicht.