Open
Bug 1746660
Opened 8 months ago
Updated 8 months ago
Incorrect scrollbar mode on startup when using "Automatically based on mouse or trackpad" setting in macOS
Categories
(Thunderbird :: Mail Window Front End, defect)
Tracking
(Not tracked)
UNCONFIRMED
People
(Reporter: mozbugzilla2021, Unassigned)
References
(Blocks 1 open bug)
Details
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:95.0) Gecko/20100101 Firefox/95.0
Steps to reproduce:
- Set “Show scroll bars” to “Automatically based on mouse or trackpad” in macOS System Preferences General pane
- Plug in external mouse
- Launch Thunderbird
Actual results:
Overlay scrollbars are used, as if the OS is in trackpad mode, when it is not. The horizontal scrollbar for message bodies is broken and will not respond to mouse button input.
Expected results:
Scrollbars should be displayed normally.
If the mouse is unplugged and replugged while Thunderbird is running, it will start showing the scrollbars in the correct mode, so this is only a problem with the way it detects the scrollbar mode on startup.
This is a regression from the previous LTS version of Thunderbird.
You need to log in
before you can comment on or make changes to this bug.
Description
•