Open Bug 1942526 Opened 19 days ago Updated 8 days ago

Window moves a few pixels away from the screen edge after it was aligned to the screen edge on restart.

Categories

(Core :: Widget: Win32, defect, P3)

Firefox 134
defect

Tracking

()

People

(Reporter: fau, Unassigned)

Details

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0

Steps to reproduce:

Align your Firefox window to the left or right screen edge (no gap between screen edge and the window). Obviously, the window is not in full-screen mode.

'Always use private browsing mode' is ON, or 'Open previous windows and tabs' is OFF.

I observe this on Win11 but not on Linux. It appears that this is triggered by the privacy settings 'Always use private browsing mode' and/or the setting 'Open previous windows and tabs' (which is turned OFF if the former is ON).

Actual results:

After restarting Firefox, the window is moved away from the edge about 15 pixel, which leaves a gap between the screen edge and the window.

Expected results:

The windows should not move by itself on restart and be placed where it was before.

Component: Untriaged → Widget: Win32
Product: Firefox → Core

I can repro on Win10.

As the window is created in the correct position and only thereafter moved inwards, though, I suspect this is intended behavior on some level. (I have no opinion as to whether it should be maintained.)

Severity: -- → S3
Priority: -- → P3
Status: UNCONFIRMED → NEW
Ever confirmed: true
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