Do not like the rounded corners at all

[brainetree]

If some insist on rounded corners, you can't simply give an option on the matter?  I can't go the rounded corners.  Know how to get rid of them in Windows 11, but when Windows 11 updated today I then got rid of Windows 11 rounded corners but have them now inside Firefox when Firefox has not been updated.

Found a supposed solution, putting a userChrome.css file in a newly created "chrome" folder in my Firefox Profile folder, but it didn't work though very carefully implemented.  Hoping there's an extension that could help, but doubtful.

Frankly it's torture, earnestly hoping a solution can be found.  Thanks for listening.

[reukiodo_uw]

I was able to get back to square corners with a userChrome.css file:

1. about:config > toolkit.legacyUserProfileCustomizations.stylesheets > true
2. about:support > Profile Folder > Open Folder > mkdir "chrome" > new file "userChrome.css":

/* Force square corners on all Firefox UI elements */
* {
  border-radius: 0px !important;
}

 I don't think anyone should have to do this just to get square corners though... the whole 'rounded everything' is terrible design and should be opt-in rather than force-out.