1660600 - Window size is calculated too big

Status: RESOLVED DUPLICATE of bug 1660100

(Core :: Widget: Gtk, defect)

Description

[dino.bob]

Attachment: About Nightly window

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:81.0) Gecko/20100101 Firefox/81.0

Steps to reproduce:

Open Firefox
go to hamburger Menu -> Help -> About Nightly

Actual results:

The About Nightly Window is way too big, about double the intended size in both x and y, bottom half is white.

Expected results:

The window should have the intended size.

Comment 1

[dino.bob]

It also affects other windows as the main and the Master password prompt. It does not always happen it does not need many tries.

mozregression:
25:00.22 INFO: Last good revision: b803fd88181eaf33ed1932e959cbf538f7d95e58
25:00.22 INFO: First bad revision: 452f89438885a3ae807196739993801d8855a1cb
25:00.22 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=b803fd88181eaf33ed1932e959cbf538f7d95e58&tochange=452f89438885a3ae807196739993801d8855a1cb

So probably a regression of https://bugzilla.mozilla.org/show_bug.cgi?id=1658885

Comment 2

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

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.