Videos will not go to full screen




8 years ago
5 years ago


(Reporter: Gordon Lane, Unassigned)


3.6 Branch
Windows XP

Firefox Tracking Flags

(Not tracked)




8 years ago
User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20101026 Firefox/3.6.12 (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20101026 Firefox/3.6.12 (.NET CLR 3.5.30729)

When to try to go to full screen on a video the screen goes blank (white). There is sound but no picture. When I press escape the picture returns to its origional size. I try the same video using Internet Explorer and it works fine.

Reproducible: Always
Example URL of such a video ?
Do you mean a html5 <video> (.ogg/webm) or a plugin like flash that is used ?
Please post the used plugin and plugin version in the last case.

Comment 2

8 years ago
Any video I try. From CNN, NY Times, BBC, ads etc. has the same results. This doesn't happen when I use Internet Explorer. I has worked in the past with Firefox. I did nothing to my computer except updates.
Please always provide an exact example (URL, which links to follow..) if you report a bug somewhere and never expect that people know the sites that you are visiting.
In this case could be an example that you mean ?
This example is using the Adobe Flash Plugin to play the videos and comparing IE plugins with plugins for all other browsers makes no sense because they are complete different plugins (ActiveX vs NPAPI).

however, i can't reproduce any problems with this example using FF3.6.12 and  
Shockwave Flash 10.1 r102 on windows 32 bit.

Please post your used flash version (from about:plugins, enter as URL) and try
Does it make a difference if you disable the hardware acceleration in flash ?
Right click in a flash video and select settings and look around for that setting

Comment 4

8 years ago
Adobe Flash Player 10.1 says it conflicts with Firefox.
What do you mean, conflicts with Firefox? Can you give the exact error message?

Comment 6

7 years ago
"The installer will automatically continue when these conflicting applicationa are closed:

* Mozilla Firefox"
Then you need to close Firefox before you install flash. Open task manager, and make sure there is no firefox.exe process listed. Flash can't install when Firefox is open.


7 years ago
Version: unspecified → 3.6 Branch
Reporter, Firefox 4.0.1 has been released, and it features significant improvements over previous releases. Can you please update to Firefox 4.0.1 or later, and retest your bug? Please also create a fresh profile (, update your plugins (Flash, Java, Quicktime, Reader, etc) and update your graphics driver and Operating system to the latest versions available. 

If you still continue to see this issue, please comment. If you do not, please close this bug as RESOLVED > WORKSFORME

filter: prefirefox4uncobugs
Last Resolved: 5 years ago
Resolution: --- → INCOMPLETE
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