446021 - fullscreen does not extend to the full screen but has title bar

Status: NEW

(Firefox :: General, defect)

Description

[Bastian Maerkisch]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1

Firefox does not always cover the complete screen in fullscreen mode after it has been terminated before in full screen mode. I use the autohide feature of the windows task bar. After a restart of firefox the fullscreen window still has a visible and defunct title bar. 

Reproducible: Always

Steps to Reproduce:
1. activate autohide feature of the windows task bar (mine is at the bottom)
2. open firefox
3. maximise window
4. acivate fullscreen mode (F11)
5. exit firefox using Alt-F4
6. restart firefox
7. activate fullscreen mode

Actual Results:  
The firefox window does not cover the whole screen in fullscreen mode. Instead it still has a title bar. This bar cannot be used in any way: the window buttons are defunct and the window cannot be dragged with the mouse.

Comment 1

[(mostly gone) XtC4UaLL [:xtc4uall]]

confirmed with
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2a1pre) Gecko/20090316 Minefield/3.2a1pre ID:20090316044350
on Windows XP/Classic with autohide feature of the windows task bar activated.

Comment 2

[Roman Kapusta]

confirmed with:
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.13) Gecko/2009073022 Firefox/3.0.13
on Windows XP with taskbar autohide and small display (Asus EEE pc, 1024x600) or can be easily simulatad in VirtualBox:
1. Firefox window must cover entire screen 1024x600, but not maximized
2. Activate fullscreen mode (F11)
3. Window Titlebar still visible in fullscreen mode

I'm also uploading screenshots

Comment 3

[Roman Kapusta]

Attachment: Firefox window covering entire screen but not maximized (before F11)

Comment 4

[Roman Kapusta]

Attachment: Firefox window in fullscreen mode with titlebar visible (after F11)

Comment 5

[Roman Kapusta]

I have noticed that Firefox in my Virtualbox was not updated, but I can confirm this bug also for current versions:

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.15) Gecko/2009101601 Firefox/3.0.15

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5