macOS: mouse cursor flickering when one window is in fullscreen
Categories
(Core :: Widget: Cocoa, defect)
Tracking
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People
(Reporter: r.mozilla, Unassigned)
Details
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:150.0) Gecko/20100101 Firefox/150.0
Steps to reproduce:
macOS: 26.5 (though it's been happening since many versions of macOS)
Firefox: 150 (though it's been happening since many versions of Firefox
Placing (at least) one window of Firefox in fullscreen (the macOS feature "fullscreen" where a virtual desktop is automatically created).
I can't find a website or something specific that repo consistently.
Actual results:
The mouse cursor is sometime flickering on other windows (fullscreen or not). It's not immediate, it can happen after a random amount of time. Finding the window that create this issue and leaving/re-entering fullscreen fix it (until it happens again later).
See this conversation on connect for other people experiencing the same issue: https://connect.mozilla.org/t5/discussions/issue-using-mac-os-sonoma-14-0-and-firefox-when-hovering-the/m-p/52434/
It gives the detail that flickering seems to be happening like links & co are overlapping between windows.
Expected results:
No mouse cursor flickering.
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Comment 1•4 months ago
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The Bugbug bot thinks this bug should belong to the 'Core::Widget: Cocoa' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.
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Comment 2•4 months ago
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N-i Josh who has recently fixed bugs related to cursor flickering on different spaces. Does this ring a bell and is this likely to be a duplicate of the bugs that you fixed?
It's entirely possible that this fix will work here, but I don't know for sure. That patch is in the latest Nightly, best thing to do is use the latest Nightly and see if the problem is gone. If it is then I'd just dupe this bug against the one with the fix.
Reporter - just to clarify - when you say the "mouse cursor is sometime flickering on other windows" - you mean other Firefox windows? Or is the mouse flickering on windows from other applications?
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Updated•4 months ago
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(In reply to Josh Aas from comment #3)
Reporter - just to clarify - when you say the "mouse cursor is sometime flickering on other windows" - you mean other Firefox windows? Or is the mouse flickering on windows from other applications?
Yes, I meant Firefox windows.
I'll check nightly to see if the issue is gone.
Since I've been using Firefox Nightly (trying to not upgrade/restart it), I didn't experience the issues I was describing. In the mean time, it happened multiple time using "normal" Firefox. While I can never be 100% sure, I think the fix mentioned by Josh may have fixed the issue.
Description
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