Moving a Split View from one window to another window while a Split View is selected will make the Split View button invisible and also working for the unselected Split View
Categories
(Firefox :: Tabbed Browser: Split View, defect, P1)
Tracking
()
| Tracking | Status | |
|---|---|---|
| firefox-esr140 | --- | unaffected |
| firefox147 | --- | disabled |
| firefox148 | --- | disabled |
| firefox149 | --- | verified |
People
(Reporter: atrif, Assigned: nsharpley)
References
(Blocks 1 open bug, Regression)
Details
(Keywords: regression, Whiteboard: [fidefe-splitview])
Attachments
(3 files)
split_invisible.gif
Found in
- 149.0a1 (2026-01-27)
Affected versions
- 149.0a1 (2025-01-27)
Tested platforms
- Affected platforms: Ubuntu 24, Windows 11, macOS 26
- Unaffected platforms: none
Steps to reproduce
- Open two windows and create a Split View in each window.
- Focus a Split View in a window.
- Move the other Split View to the window from step 2.
- Use the
Separate tabsinvisible Split View button.
Expected result
- Step2: Split View is moved successfully with no glitches.
- Step3: The focused Split view is separated.
Actual result
- Step2: The Split View button becomes invisible.
- Step3: The unfocused Split View is separated
Regression range
- Happens after bug 2012661.
Additional notes
- Attached a screen recording.
|
||
Updated•6 days ago
|
|
Reporter | |
Comment 1•6 days ago
|
||
If we use the Reverse tabs button after step 3, the Split View will be shown for all 4 tabs
|
||
Comment 2•6 days ago
|
||
Set release status flags based on info from the regressing bug 2012661
:nsharpley, since you are the author of the regressor, bug 2012661, could you take a look? Also, could you set the severity field?
For more information, please visit BugBot documentation.
|
Assignee | |
Updated•6 days ago
|
|
|
Assignee | |
Comment 3•6 days ago
|
||
|
|
Assignee | |
Comment 4•6 days ago
|
||
Alexandru, I actually wasn't able to reproduce this but in theory my WIP patch should ensure the behaviour is reverted whilst still preserving session restore behaviour. Could you please test the WIP patch attached to see if its reproducible? Thank you!
|
|
Reporter | |
Comment 5•3 days ago
|
||
(In reply to Nikki Sharpley (:nikkis) (she/her) from comment #4)
Alexandru, I actually wasn't able to reproduce this but in theory my WIP patch should ensure the behaviour is reverted whilst still preserving session restore behaviour. Could you please test the WIP patch attached to see if its reproducible? Thank you!
Hello! Unfortunately, I am not familiar with building Firefox, or at least I don't know how to download the build from the attached patch from comment 3 (if possbile). Can you please provide me a build? Thank you in advance
|
||
Updated•2 days ago
|
|
||
Comment 7•11 hours ago
|
||
| bugherder | ||
|
|
Reporter | |
Comment 8•2 hours ago
|
||
Verified fixed with Firefox 149.0a1 (2026-02-05) on Windows 11, macOS 26 and Ubuntu 24. Moving a Split View to another window while another Split View is selected will no longer reproduce the issue. Dropping the ni?. Nikki provided me the build, thank you!
Description
•