1187125 - Content can be smaller than space given by the window after creating a new window

Status: RESOLVED WORKSFORME

(Firefox :: Theme, defect, P4)

Description

[Tim Nguyen :ntim]

Attachment: Screenshot

STR :
- Create a new window (either launch Firefox, or click "New Window")
- You get what's in the screenshot intermittently (not often though)

Comment 1

[Tim Nguyen :ntim]

See https://bugzilla.mozilla.org/show_bug.cgi?id=1173725#c124 for more details.

Comment 2

[Tim Nguyen :ntim]

Jim, can you investigate what's going on here ?
(I'm fairly sure it's related to bug 1187153 too).

Those 2 bugs used to happen on Windows 8 and Windows 7 as well when custom caption buttons were used. May as well be related to the chromemargin.

Comment 3

[Jim Mathies [:jimm]]

Do you see this without e10s?

Comment 4

[Tim Nguyen :ntim]

(In reply to Jim Mathies [:jimm] from comment #3)
> Do you see this without e10s?

I haven't checked on Win 10, but the same issue occured on Win 8 and 7 (e10s enabled or not) when custom caption buttons were used (via an userstyle)

Comment 5

[Jim Mathies [:jimm]]

Hmm, I can't reproduce on Win7 using the following str:

1) set your home page to google.com and specify it should be loaded for new windows through options
2) using ctrl-t, open twenty windows

result: window content bounds looked fine in all new windows.

Comment 6

[Tim Nguyen :ntim]

(In reply to Jim Mathies [:jimm] from comment #5)
> Hmm, I can't reproduce on Win7 using the following str:
> 
> 1) set your home page to google.com and specify it should be loaded for new
> windows through options
> 2) using ctrl-t, open twenty windows
> 
> result: window content bounds looked fine in all new windows.

You need custom caption buttons. Try this userstyle : https://userstyles.org/styles/104729/devfox
(Enable the custom window frame option).
You may also need to reduce the chromemargin.

Comment 7

[Justin Dolske [:Dolske]]

P4 based on this not being a default config nor a regression in Windows 10, but it bothers me a bit more than a normal P4 because the cause-and-effect is not at all going to be obvious to a user who has done this.

Comment 8

[Tim Nguyen :ntim]

(In reply to Justin Dolske [:Dolske] from comment #7)
> P4 based on this not being a default config
This is now the default config on Windows 10, we use the custom caption buttons, which causes this bug.
This is on 100% DPI too. Although, since this is hard to reproduce I agree about the priority.