Clear Cookies & Cache

• https://support.mozilla.com/en-US/kb/Template:clearCookiesCache

Clear the Network Cache

• https://support.mozilla.com/en-US/kb/How%20to%20clear%20the%20cache#w_clear-the-cache

Reload web page(s) and bypass the cache.

• Press and hold Shift and left-click the Reload button.
• Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• Press "Cmd + Shift + R" (MAC)

Check and tell if its working.

no... online videos opened up to full screen are still playing behind the task bar instead of in front of it.

this doesn't happen in Netflix's web player... but does on all flash videos, divx, etc...

Troubleshooting extensions and themes

• https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes

Check and tell if its working.

Have the exact same problem. Flash player opens in task bar as separate programm and the video is played essentially on the desktop, behind the taskbar. Problem occurs only in fullscreen, normal mode is ok. IE is ok, so there must not be a problem with Flash player (latest version). Problem occurs ALSO in Firefox safe mode, so it's a Firefox 7 related problem, no plugins, no themes, no dvxa etc. OS win7 64

Yeah... I reverted back to Firefox 6.03 and everything is back to normal. This is definitely a Firefox 7 issue.

Any solutions other than reverting back to previous versions? Anyone? Major bug!

Try to disable the hardware acceleration in the Flash Player.

See:

• https://support.mozilla.com/kb/Cannot+view+full+screen+Flash+videos
• http://www.youtube.com/swf_test.html (right-click the player: Settings)

Flash "Display settings" window:

• http://www.macromedia.com/support/documentation/en/flashplayer/help/help01.html

All above actions have been taken to no avail. This is a firefox 7 issue. It occurs even in safe mode! As stated above: Tried with no add-ons, no ha, all plugins (but flash) disabled. Similar threads exist and Mozilla does not provide a useful solution other than the usual "disable ha, clear cookies etc."!!! This has nothing to do with that. https://support.mozilla.com/en-US/questions/880714#answer-253160 https://support.mozilla.com/en-US/questions/880297

Try Uninstalling & Reinstalling the Flash plugin

Uninstall Flash Player

• http://kb2.adobe.com/cps/141/tn_14157.html

How do I install the Flash plugin?

• https://support.mozilla.com/en-US/kb/installing-flash

Check and tell if its working.

Hey Tryfos79... just curious... are you using an HTPC (home theater PC)?

I'm only asking b/c as I've been trying to figure this out I've found several posts about Google Chrome having a similar problem last year (I don't believe they've been provided a solution) for people using Win 7 x64 on HTPCs... in particular people who changed the DPI settings in Win 7 to above 100% (which is a must if you're using your computer with an HDTV as the monitor and plan on being able to read the text).

That is my situation... HTPC connected to a Sony Bravia... DPI @ 200%. I have no idea if this is the issue for us, but like I said, Chrome apparently does the same thing as of about a year ago to folks w/the DPI maxed out.

Ok here's the deal: I'd spotted those threads about Chrome and DPI myself too, but didn't bother since Firefox is another browser, but after reading your advice I decided to give it a try. I do have my PC connected to a HDTV (not technically a HTPC it's custom built) and I did have the dpi settings to 113% (not 200%). I reverted to normal 100% and bam the situation was resolved! But here's an interesting twist: Since the display on the HDTV is practically unbearable with DPI at 100%, I decided to revert back to 113-115% and -what a surprise!- the problem did NOT come back. Strange things, I don't know if it was Firefox or Flash on the first place, but someone has to look into it. Not sure though about what that option in the custom DPI settings "use win xp style dpi setting" is... Thanks a lot my friend!

Awesome! Glad that worked for you. I didn't have time to test it this morning as I was still on Firefox 6.

Just upgraded to Firefox 7 and same thing... when DPI is set to 100%, problem resolved. Unfortunately for me this is on a TV in my living room and having the DPI at anything under 150% is unbearable. When I resorted back to 200%... no luck, same problem. Then again at 150%, same problem. DAMMIT!

I guess it's Firefox 6 for me until they get this resolved (fingers crossed). It's def a Firefox issue, not Flash, as Divx vids and the Divx player are doing the same exact thing.

At least we know what the hell's going on though I guess...

Try Firefox 7.0.1, it solved this issue for me.

Thanks corduroy and tryfos, It is a DPI issue for me as well. Problem occurs at 150%, switched to 100% problem went away, switched back to 150% and problem returns, tried 125% and problem went away again. I'm using 125% right now but everything's a bit small for me, so i'll be looking for other solutions. I'll either go with a large magnifying glass set on a stand between me and the TV, or a different web browser, but i haven't decided yet. Good luck to all.

youvegottobekiddingme try to set a custom DPI from the win7 settings. For example 130 or 140%. I don't know from which point the problem starts. Try step by step until the problem occurs and then revert back to the last DPI setting. 140 from 150 is not a big difference.

Alright... I found a fix!

Right click on your Firefox icon (not the one in your task bar), if it's not on your desktop, find it in the Mozilla Firefox program folder.

After right clicking, select Properties, then the Compatibility tab, then check the box that says Disable display scaling on high DPI settings.

That's it. I'm now back to using 200% DPI and have no problems with fullscreen videos. What a pain in the ass!

That worked for me, corduroy1979. Thanks!

corduroy1979, Thank you very much for ending my nightmare. I was waiting patiently for a fix from Firefox to no avail. Your solution worked perfectly. Lesson learned, I will wait at least a week before applying updates.

Thanks again. Alex (Toronto)

Thanks corduroy, That worked for me as well. You saved me a lot of aggravation.