Hate the rounded corners inside firefox. Disabled them in windows 11 a long time ago, now you have them inside firefox itself.

[brainetree]

Is the rounded corners inside Firefox something new?  Got rid of them in Windows 11 like a lot of people do and keep them square again after updates and here you betray me.  LOL.

[Agentvirtuel]

Hello

A subject.
https://www.reddit.com/r/FirefoxCSS/comments/1ov0806/does_anyone_know_how_we_can_unround_our_tabs

And, for information purposes.
https://support.mozilla.org/en-US/questions/1546836#answer-1778873