Driver disconnecting mouse

What model of mouse you are using, does it have some additional software/driver for mouse control? Did you tried wit some other mouse, some simple one?

Did you tried to remove needless Add-ons or reset Firefox? Help >>> Reset with Add-ons disabled...

 

I have this mouse http://www.x7.cn/en/product.asp?id=13
I ve already tried reset Firefox.

 

Like I said, have you tried disabling Flash hardware acceleration?

 

I dont know what do you mean. Uninstall Flash player and try to watch withou it or?

 

Disabling and uninstalling are quite different.
To disable Hardware Acceleration you need to go to Firefox Advanced Settings.

 

Yes I found it in options and unselect it.

 

Ok, now attempt playing videos as you did before when using firefox then report back.

 

A4Tech X-750F... Do you use A4Tech Oscar software to controll/redefine keys and sensitivity on mouse? Try to disable Oscar for a while to see is there any difference...

Two of my rigs at home are using X7 mouse, one of them uses 100 years old A4Tech X-710BH (without Oscar software enabled all the time) with Firefox 24.0 + Flash Player 11.8.800.168, other rig is using A4Tech XL-750BK (also without Oscar software enabled all the time) with Firefox 24.0 + Flash Player 11.8.800.168 and. Oscar is not runing all the time, I'm using it only to load gaming profile (sensitiviry, profile for buttons..) and flash that profile to mouse internal RAM (just for A4Tech XL-750BK, A4Tech X-710BH doesn't have internal RAM).

Add-ons I'm using with FF 24.0 are:
Download Statusbar 0.9.10
Adblock Plus 2.3.2
All-in-One Sidebar 0.7.20
ColorfulTabs 19.7
Download Youtube Videos as MP4 1.7.9
Firefox Showcase 0.9.5.10
SearchPreview 6.4
Tab Mix Plus 0.4.1.0
Tab Scope 1.5
Youtube To MP3 PRO 1.40.rev44.1

 

I dont use Oscar too

 

No, dellon, I meant Flash hardware acceleration, not FF's.


@Rossi184
I already told you how to disable Flash hardware acceleration.
When viewing a video in YouTube, pause it, right-click on video, click 'Settings', and untick 'Enable hardware acceleration'.
The reload the webpage of the video by pressing F5.

Then try playing the videos you had the white screen problems with, to see if Firefox still gets the white screen problem.

 

Ah, sorry about that. I was under the impression that disabling hardware acceleration through Firefox would disable all Hardware acceleration without having to disable it individually.

Another Thought
When using the HD 4000 Series on Windows 8 Hardware Acceleration is disabled by default in Windowed Mode. But, I'm not sure if it's the same for Windows 7 Users and below.

 

I unclicked Enable hardware acceleration and than I disabled accelration HW and still video took white screen

 

To OP...
You are using some Radeon card from HD 4800 series, probably 4850 od 4870... On first rig I've mention above I'm also using PowerColor ATI Radeon HD 4850 (M98 chip) 1GB GDDR5 with these drivers for a long time: AMD Catalyst 8.97 April 18 2012 (here) + AMD Catalyst Application Profiles 13.5 CAP1 (here)...without any problem in games, drivers are nice and stabile for gaming (even for new games), card is nicely oveclocked (GPU/mem=705/3840) and everything about it is rock stabile.

Only thing I notice sometimes is small text corruption while scrolling pages in Firefox, mostly noticable in Facebook, but not always. Solution for that, in Firefox address field type: about:config ..then: gfx.content.azure.enabled ...and change it from: true ...to: false

Just try this driver...

Edit:
With drivers above I have no other problems with Firefox, any Flash Players, Youtube....

Edit #2:
About 10 days ago on one Acer ASpire laptop with Radeon Mobility HD 3200 and Windows 7 Home Premium SP1 64bit I had a problem with Firefox 23.0.1, white screen while playing Youtube videos in window and full screen, problem: Flash Player 11.8.800.94. Solution: I've reverted Flash Player to version Flash Player 11.7.700.224 and do a block of Flash Player update.

 

Ok man I will try it I will downolad those files and than I will try older flash player.

 

Unfortunately no.
The one in FF only affects page rendering, while the Flash plug-in has its own to decode videos and rendering stuff.

Make sure you tested it after you reload the page.
Simply disabling it and then playing the video again without reloading the page is not the right way to test it.

If you're looking for an official source to download Flash 11.7, go here and scroll down a bit.
There should be a section for version 11.7.700.242.

 

Finally it works thank you guys

 

What did you do?

 

I installed that drives what did you take here and than I installed older version of flash player.

 

I'm glad I was helpful. Enjoy with that card and later give here a little OC boost via MSI Afterburner...