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Allowing Flash content via the lock in the top left freezes Firefox

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I upgraded 2 PC's to Windows 1903. 1 is running perfectly fine the other cant use Adobe Flash in Firefox anymore. As soon as i activate/allow any flash on any site Firefox just freezes and has to be closed. If i use chrome on the same sites etc. everything is fine and runs smoothly. I tried reinstalling the Adobe Flash stuff, used an older Version of Adobe and Firefox (different combinations), deleted my Profile, tried factory reset and many more options (disabling hardware acceleration etc.)

Just kinda stuck now where the problem comes from

I upgraded 2 PC's to Windows 1903. 1 is running perfectly fine the other cant use Adobe Flash in Firefox anymore. As soon as i activate/allow any flash on any site Firefox just freezes and has to be closed. If i use chrome on the same sites etc. everything is fine and runs smoothly. I tried reinstalling the Adobe Flash stuff, used an older Version of Adobe and Firefox (different combinations), deleted my Profile, tried factory reset and many more options (disabling hardware acceleration etc.) Just kinda stuck now where the problem comes from
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Additional System Details

Installed Plug-ins

Just Adobe Flash

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36

More Information

Eldar Value 4 solutions 45 answers

mronion1 said

I upgraded 2 PC's to Windows 1903. 1 is running perfectly fine the other cant use Adobe Flash in Firefox anymore. As soon as i activate/allow any flash on any site Firefox just freezes and has to be closed. If i use chrome on the same sites etc. everything is fine and runs smoothly. I tried reinstalling the Adobe Flash stuff, used an older Version of Adobe and Firefox (different combinations), deleted my Profile, tried factory reset and many more options (disabling hardware acceleration etc.) Just kinda stuck now where the problem comes from

uninstall flash player on the problematic: https://fpdownload.macromedia.com/pub/labs/flashruntimes/flashplayer/uninstall_flash_player.exe

then reinstall from adobe.

''mronion1 [[#question-1267071|said]]'' <blockquote> I upgraded 2 PC's to Windows 1903. 1 is running perfectly fine the other cant use Adobe Flash in Firefox anymore. As soon as i activate/allow any flash on any site Firefox just freezes and has to be closed. If i use chrome on the same sites etc. everything is fine and runs smoothly. I tried reinstalling the Adobe Flash stuff, used an older Version of Adobe and Firefox (different combinations), deleted my Profile, tried factory reset and many more options (disabling hardware acceleration etc.) Just kinda stuck now where the problem comes from </blockquote> uninstall flash player on the problematic: https://fpdownload.macromedia.com/pub/labs/flashruntimes/flashplayer/uninstall_flash_player.exe then reinstall from adobe.
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Question owner

Gonna test it as soon as iam back

thank you for the response already :)

Gonna test it as soon as iam back thank you for the response already :)
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Question owner

sadly the problem still persists

sadly the problem still persists
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Eldar Value 4 solutions 45 answers

mronion1 said

sadly the problem still persists

First, go to `about:addons`, plugins tab, disable flash player and see if the problems occurs without flash player plugin enabled.

If problems not occurs, follow those instructions: Run the uninstaller again. after its done, make sure the following paths are removed (if not - remove it, if windows prevents you to delete any of them, you can use tools like LockHunter, AdwCleaner to perform the deletion):

%windir%\system32\Macromed\Flash\ %windir%\SysWOW64\Macromed\Flash\ %appdata%\Adobe\Flash Player\ %appdata%\Macromedia\Flash Player\ %windir%\system32\FlashPlayerApp.exe %windir%\system32\FlashPlayerInstaller.exe %windir%\system32\FlashPlayerCPLApp.cpl %windir%\SysWOW64\FlashPlayerApp.exe %windir%\SysWOW64\FlashPlayerInstaller.exe %windir%\SysWOW64\FlashPlayerCPLApp.cpl

After that, restart the pc and after its booted run the *uninstaller* again, only after it finishes again open firefox, check if the problem exists without flash player plugin at all, and after that reinstall flash player.

''mronion1 [[#answer-1245607|said]]'' <blockquote> sadly the problem still persists </blockquote> First, go to `about:addons`, plugins tab, disable flash player and see if the problems occurs without flash player plugin enabled. If problems not occurs, follow those instructions: Run the uninstaller again. after its done, make sure the following paths are removed (if not - remove it, if windows prevents you to delete any of them, you can use tools like LockHunter, AdwCleaner to perform the deletion): %windir%\system32\Macromed\Flash\ %windir%\SysWOW64\Macromed\Flash\ %appdata%\Adobe\Flash Player\ %appdata%\Macromedia\Flash Player\ %windir%\system32\FlashPlayerApp.exe %windir%\system32\FlashPlayerInstaller.exe %windir%\system32\FlashPlayerCPLApp.cpl %windir%\SysWOW64\FlashPlayerApp.exe %windir%\SysWOW64\FlashPlayerInstaller.exe %windir%\SysWOW64\FlashPlayerCPLApp.cpl After that, restart the pc and after its booted run the *uninstaller* again, only after it finishes again open firefox, check if the problem exists without flash player plugin at all, and after that reinstall flash player.
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