12-10-2026 11:33 AM - edited 14-10-2026 10:44 AM
With the new UI, the only ways to close tabs are:
1) Select the tab and thereby reload the page
2) Right click on the tab and select close from context menu.
Previous behavior, if I remember right - You could mouse over the tab and the full tab with X would appear, allowing tab closing.
The current setup really slows down workflow and is counterintuitive.
12-10-2026 10:49 PM
When you say with the new AI, are you referring to the Smart Window feature?
14-10-2026 02:53 AM
I suspect they meant to type "UI" and are referring to the new rounded Nova look
14-10-2026 10:13 AM
I was confused because I couldn't replicate the issue on my side. I checked Nightly and release but I can still see the x menu to close the tab when I move my mouse over the tab.
@dftf can you perhaps see if you can replicate it?
14-10-2026 01:08 PM
Why don't you tag the original user, @jwm-mbartek ?
They're on a Mac; I'm on Windows, so this may not be an issue I can replicate.
From their screenshot, it looks like they have Firefox in full-screen mode and none of the tabs are showing the 'X' to close them. Maybe when you have a certain number open, and the tabs reduce in-size, the X gets removed from them?
Surely most of Mozilla in the US use Mac devices? Can't they test this internally?
14-10-2026 02:51 PM
I opened a fresh window and that's exactly the behavior I see. X is visible if there are a small number of tabs. X disappears due to small tab size with a lot of tabs open. It would be good to have it reappear on mouseover.
14-10-2026 10:47 AM