Option to disable 'rounded' appearance

[Ben-Rogue]

I don't want this rounded mobile look on desktop, an option to change this in appearance would be appreciated.

[Nawid3333]

would be nice to have my squares back as a option because round ui creates free unused space which leads sometimes to a problem where when i click a tab and it lands in this area between tabs and it then selects the wrong tab.

[sts9600]

Bring back rectangular tabs as an official setting!

Сurrently it's only a hidden "about:config" flag in Firefox 159.

In Firefox 159, the new rounded Nova tabs reduce the visual clarity of tab boundaries for me. I'm used to quickly spotting the active tab by its crisp rectangular outline, but now it blends into the neighboring tabs — especially when many tabs are open and they get narrow.

Please bring back the option to choose the tab shape in Settings, not just through the hidden "about:config" flag that you plan to remove in Firefox 161. For users who have worked with the browser for years, interface stability and the ability to fine-tune it really matter.

I'm not asking you to cancel Nova entirely — just give us an official toggle for "classic / rounded tabs" in "about:preferences".