1838424 - Incorrect display of previews of windows minimized to the Dock during long sessions

Status: UNCONFIRMED

(Core :: Widget: Cocoa, defect, P5)

Description

[5silentrain]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/114.0

Steps to reproduce:

1. Open several windows and load different sites into them;
2. Minimize windows to the Dock;
3. Do not close Firefox (do not unload it from memory) for a long time (at least a day), leaving the windows minimized to the Dock. You can go to sleep leaving your Mac on all night;

Actual results:

The next morning, previews of Firefox windows minimized to the Dock will not be displayed correctly (the upper left corner of the window noticeably increases). I did not notice such behavior for Chrome and Safari. See screenshots in attachment.

Comment 1

[5silentrain]

Attachment: Bug 1.png

Comment 2

[5silentrain]

Attachment: The preview should look like this 1.png

Comment 3

[5silentrain]

Attachment: Bug 2.png

Comment 4

[5silentrain]

Attachment: The preview should look like this 2.png

Comment 5

[5silentrain]

Attachment: Bug 3.png

Comment 6

[5silentrain]

Attachment: The preview should look like this 3.png

Comment 7

[5silentrain]

Attachment: Bug 4.png

Comment 8

[5silentrain]

Attachment: The preview should look like this 4.png

Comment 9

[5silentrain]

Attachment: Bug 5.png

Comment 10

[5silentrain]

Attachment: The preview should look like this 5.png

Comment 11

[5silentrain]

Attachment: Bug 6.png

Comment 12

[5silentrain]

Attachment: The preview should look like this 6.png

Comment 13

[5silentrain]

Just in case, here is a copy of the screenshots from the attachment that I uploaded to Imgur:

Bug 1: https://i.imgur.com/71SqLg7.png
The preview should look like this 1: https://i.imgur.com/JoLV7a4.png

Bug 2: https://i.imgur.com/ux6gplO.png
The preview should look like this 2: https://i.imgur.com/otXLhLW.png

Bug 3: https://i.imgur.com/Eo1681W.png
The preview should look like this 3: https://i.imgur.com/0g26d1X.png

Bug 4: https://i.imgur.com/YnnDOcp.png
The preview should look like this 4: https://i.imgur.com/38dsMBw.png

Bug 5: https://i.imgur.com/ZkFetqU.png
The preview should look like this 5: https://i.imgur.com/jbGKwfP.png

Bug 6: https://i.imgur.com/AAaMgUy.png
The preview should look like this 6: https://i.imgur.com/a5TbGBE.png

Comment 14

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

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.

Comment 15

[5silentrain]

The version of macOS I have is the most recent one — 13.4 (22F66).

Comment 16

[5silentrain]

Moreover, there is no need to wait a whole day to catch this bug. It happens to me within a few hours ⏳

Comment 17

[5silentrain]

I have the latest version of Firefox installed — 125.0.3. macOS has also been updated to the latest version — 14.4.1 (23E224). But this bug is still present. Screenshot: https://i.imgur.com/vxMdwQN.png It should be like this: https://i.imgur.com/JWXrcpV.png

Comment 18

[5silentrain]

Firefox version — 129.0.2
macOS version — 14.6.1 (23G93)

Bad behavior: https://i.imgur.com/jlebKwm.png
Correct behavior: https://i.imgur.com/FJ3ikcP.png

Comment 19

[5silentrain]

Firefox version — 134.0.2
Firefox Developer Edition version — 135.0b9
macOS version — 15.3 (24D60)

Bad behavior: https://i.imgur.com/aBj3wpz.png
Correct behavior: https://i.imgur.com/xhWIwqi.png

I have a hunch that this is due to the automatic theme change in macOS (from dark to light and back) 🤔

Comment 20

[5silentrain]

Attachment: Bad behavior.png

Comment 21

[5silentrain]

Attachment: Correct behavior.png