433119 - When maximising the Firefox window, content is not always resized to fit

Status: UNCONFIRMED

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[Duncan Loveday]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9pre) Gecko/2008050806 Minefield/3.0pre
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9pre) Gecko/2008050806 Minefield/3.0pre

VERY occasionally Firefox does not resize its display to match a change in size of the window. The attached image shows an example where the window has just been maximised but the content is still occupying the original, smaller size.

Reproducible: Sometimes

Steps to Reproduce:
1. This occurs very infrequently and I don't think it can be reproduced systematically by any normal use of the browser.
2.
3.
Actual Results:  
Content is not always resized to match a change in size of the window.

Expected Results:  
Content should always be resized to match a change in size of the window.

When it goes wrong, the conditon is persistent - I can switch tabs and return to the window and it is still in this state. I can also scroll the content using the scrollbars and drag the frame border up and down. It behaves as if the window is still of the old size.

Comment 1

[Duncan Loveday]

Attachment: Example - bitmap image

Comment 2

[Duncan Loveday]

Attachment: Example 2

Just to note that this problem is still present in version 3.0.1

Comment 3

[Mathieu Leplatre [:leplatrem]]

Attachment: Screenshot from 2016-11-11 10-33-17.png

I never had this bug before, but been using Nightly lately, I can reproduce when I switch to a bigger screen with Firefox maximized.

- Firefox 52.0a1 (2016-11-10) (64-bit)
- Ubuntu 16.10 64-bit
- GNOME Shell 3.20.4