2005064 - title bar not showing

Status: UNCONFIRMED

(Firefox :: Toolbars and Customization, defect)

Description

[Alex]

Attachment: bug firefox.jpg

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:146.0) Gecko/20100101 Firefox/146.0

Steps to reproduce:

Start Firefox.

Actual results:

Title bar is not showing, even though it's checked yes in the "customize toolbar" window (see screenshot).

When I lauch firefox a second time, the title bar is there. It seems to disappear only at the first cold start window.

Expected results:

Title bar should be showing from the beginning.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Firefox::Toolbars and Customization' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Dana Lucaci, Desktop QA]

Hi,
I tried to reproduce this issue using Firefox 146.0 (2025-12-05) on Windows 10 by following the steps in the description, but I was not able to do so.
Are there any additional steps, settings, or details that I might be missing? Is this still reproducible with a clean profile?

Thank you!

Comment 3

[Bluescorer]

Title bar not present despite the box ticked. I can restore by depressing F11 x2.
I put this on the forum as well and a person responded that a fix was in for 146 but it not there today.

Thanks,

Device name Dads
Processor 12th Gen Intel(R) Core(TM) i5-12400 (2.50 GHz)
Installed RAM 16.0 GB (15.7 GB usable)
Device ID 38314F80-AF8B-4B9D-926A-9CB1C201AF77
Product ID 00355-60817-72626-AAOEM
System type 64-bit operating system, x64-based processor
Pen and touch No pen or touch input is available for this display
Windows 11, version 25H2

Comment 4

[Thomas Peters]

I have the same issue here, I think it started with FF 143 or 144. Title bar is missing on first start of Firefox after booting Windows, on next start the title bar is there. However, I can make it disappear every time if I enable "Delete cookies and site data when Firefox is closed" in the Privacy&Security settings.

Comment 5

[Thomas Peters]

@Dana Lucaci, could you try on Windows 11? It only occurred after I upgraded from Windows 10 to 11 (no fresh install), even with a clean profile. Maybe it's OS or upgrade related.

Comment 6

[❌ PTO, back 5 Jan ❌ Jared Hirsch [:jhirsch] (he/him) (Needinfo please)]

See question in comment 5

Comment 7

[Bluescorer]

On a different post, it was stated that this is now know issue and will be corrected in a near release.