If you have submitted crash reports then please post the IDs of one or more recent crash reports that have a "bp-" prefix:

• bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

You can find the Report ID of recent crash reports on the "Help > Troubleshooting Information" page (about:support).

• Click the "All Crash Reports" button on this page to open the about:crashes page and see all crash reports.

If necessary then you can open about: pages via the location/address bar.

See:

• http://kb.mozillazine.org/Mozilla_Crash_Reporter
• https://support.mozilla.org/kb/Mozilla+Crash+Reporter

bp-7a799a20-3116-47b1-8ade-1e5212140904

bp-46e3c734-9784-46b9-9484-b02b72140903 1 hour ago bp-880c04b7-fff6-44dd-84a4-dd8a82140903 1 hour ago bp-c8ee710b-b1a1-45b0-9748-c9f9d2140903 1 hour ago bp-8c6c68e3-0e7e-40a8-8c6f-dc9512140903 1 hour ago bp-cfde6d8a-5570-42ca-8ace-f16ac2140903 1 hour ago bp-cb85ee28-44c5-4b21-88b2-db6f72140903 2 hours ago bp-b4f3591f-005d-4514-a0a0-1e3ab2140903 2 hours ago bp-1d8ff76d-4495-49c2-a4c6-d89292140903 1 day ago bp-1640af09-fe79-4d0e-89d6-a4ff52140903 1 day ago bp-b104891b-fd94-406b-8bb7-3f3c42140903 1 day ago

bp-7a799a20-3116-47b1-8ade-1e5212140904 Signature hang | ntdll.dll@0x3d2ec Process Type plugin Shockwave Flash Version:14.0.0.179 Filename:NPSWF32_14_0_0_179.dll

Bing Search ntdll.dll; http://www.bing.com/search?q=ntdll.dll

These are also flagged in the crash reports;

combase.dll

rpcrt4.dll

tiptsf.dll

Thank you - there are many different directions that the search takes me, I will start tonight when I get home from work by uninstalling my nvidia driver and doing a clean install.

I'm getting this same issue as well. It doesn't seem to be all videos, but maybe mostly embedded videos. I tried completely uninstalling Flash Player and Firefox and re-installing them but it still happens. Drivers and Windows are both completely updated as well. All the crash reports so far seem to only have an issue with ntdll.dll. I'm using a Surface Pro 1 with Windows 8.1.

Crash Report: https://crash-stats.mozilla.com/report/index/28e2fb52-6458-4a29-b8ea-50e792141102

Process Type plugin Shockwave Flash

This was also flagged;

ntdll.dll = Microsoft

Perform a System File Check to fix the corrupted system files http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html

See if there are updates for your graphics drive drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

I'm also seeing this issue. Graphics drivers are fully updated, and it's happening on a variety of machines.

kop48 Please go to the top of any support.mozilla.org web page and use the Ask A Question link; https://support.mozilla.org/en-US/questions/new This will let us look at your system details. No Personal Information Is Collected.

BUT log in from one of the effected computers.

Done! https://support.mozilla.org/en-US/questions/1040869

Exact same problem here, right clicking crashes the plug-in when in windowed mode, but works "fine"(video hangs but continues after context menu is closed) when in fullscreen. One weird thing is that it works perfectly fine on youtube.com (using plugin to force flash player)

1.Yes I have disabled the protected mode. 2.Yes I have the latest Adobe and drivers for graphics. 3.Restarted FF in safemode did not help. 4.Hardware acceleration on or off makes no difference.

Working fine on my other computer running Windows 7, so I'm guessing it's a Windows 8.1 thing.

https://crash-stats.mozilla.com/report/index/d13d94ec-0baa-494c-950f-eb5b42150218