1858483 - (minor visual glitch) Close button highlighted when dragging titlebar from maximized mode.

Status: RESOLVED WORKSFORME

(Core :: Widget: Win32, defect)

Description

[John Doe Smith]

Attachment: titebar bug.mp4

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/118.0

Steps to reproduce:

Click and hold on titlebar, drag downwards

Actual results:

browser exits from maximized, as expected, but close button is highlighted on its own for no reason.

Expected results:

The close button should remain idle since it has not been interacted with. It doesn't highlight when dragging in unmaximized mode, only when transitioning from maximized to unmaximized.

Comment 1

[Alice0775 White]

I can reproduce this issue on Nightly120.0a1 Windows10.
And I can also reproduce on Firefox69.0....

STR:
0. Enable Snap windows from Windows settings.

1. Open Firefox.
2. Switch to normal window size mode.
3. Drag the title bar to the top edge of the screen with the mouse. Do not release the mouse button yet.
4. Remember the position of the close button.
5. Release the mouse button to maximize the browser.
6. Press the mouse button at the position memorized in step 4. Then drag downward.

NOTE:
If the position to be memorized in step 4 is another button (e.g. List All Tabs button), that button will be highlighted (mouse hover status) in step 6.

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=32552726554321d35a8c18224343fe73ece324c2&tochange=0930049c0ca984c909d11ba2853ef6d96e43e242

Comment 2

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

:mconley, since you are the author of the regressor, bug 1534389, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 3

[Ray Kraesig [:rkraesig]]

As noted in comment 1, this also happens on Windows 10.

Comment 4

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

Set release status flags based on info from the regressing bug 1534389

Comment 5

[Greg Stoll :gstoll]

I can't repro this in Nightly in Windows 11. If anyone else is able to repro, feel free to reopen.