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 🙂

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

Eggnog1165 — Tue, 08 Sep 2026 18:09:31 GMT

Why do we have to use userChrome tweaks, and continuously patch our stylesheets whenever it breaks, just to make such a trivial change as to revert those silly rounded corners? Why cant we have a very basic slider for it somewhere? I am not thrilled that Firefox is copying Chrome's design even harder, but I cant stand these overly rounded corners, and its not like the amount of it was gorgeus even since the last redesign.

I did not have a problem with colorways. But if development time was found for that, or for the redesign, then surely a slider for firefox UI border radiuses can also be implemented.

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

Argonaute — Tue, 15 Sep 2026 09:12:19 GMT

Enabling aesthetic changes, such as rounded tab corners, should remain a theme option rather than something achieved by hacking .css files.
Having been a Firefox user for ages, I believe it doesn't need to mimic Chrome to stay relevant.
It must retain its own distinct personality.

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

Eggnog1165 — Tue, 15 Sep 2026 16:19:39 GMT

Having been a Firefox user for ages, I believe it doesn't need to mimic Chrome to stay relevant.

And definetly not rounded corners will make it more relevant.

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

Agentvirtuel — Tue, 15 Sep 2026 16:30:25 GMT

Hello

https://connect.mozilla.org/t5/discussions/take-project-nova-for-a-spin-in-nightly/td-p/131273

https://connect.mozilla.org/t5/discussions/feedback-on-the-new-ui-corner-rounding-dark-theme-and-window/td-p/138339