topic Re: Removed rounded corners on tabs and urlbar (Firefox nightly 156 Linux) in Discussions

Removed rounded corners on tabs and urlbar (Firefox nightly 156 Linux)

olen — Sun, 16 Aug 2026 15:22:57 GMT

I have disabled the new Nova UI .... Not to my taste

After some search & testing I have nearly manage to get rid of the rounded corners on the urlbar.

Is it possible to get rid those rounded corners completely ?

From my userChrome.css

#urlbar {
font-size: 16pt !important;
outline: 3px solid #000000 !important;
}

#urlbar-background {
outline-offset: 0 !important;
border-radius: 0px !important;
box-shadow: none !important;
background-color: black !important;
}

Re: Removed rounded corners on tabs and urlbar (Firefox nightly 156 Linux)

siffemcon — Sun, 16 Aug 2026 21:05:54 GMT

Try adding this:

* {
border-radius: 0 !important;
}

@media -moz-pref("browser.nova.enabled") {
:root {
--chrome-window-gap: 0 !important;
--chrome-block-radius: 0 !important;
--chrome-content-separator-color: transparent !important;
}
}

Re: Removed rounded corners on tabs and urlbar (Firefox nightly 156 Linux)

olen — Mon, 17 Aug 2026 12:43:36 GMT

Interesting.

To my userChrome.css it was enough to add

* {
border-radius: 0 !important;
}

It removed the rounded corner from tabs and the urlbar.

Thx for the info 🙂