I removed and installed Adobe Flash Player (AFP) a lot of times without error but, Firefox (FF) doesn't realize AFP.
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This problem drove me nuts. I tried about everything. Finally creating a new profile using the profile manager, https://support.mozilla.org/en-US/kb/profile-manag
I used nothing from the old profile, and deleted it although I backed it up first. Interestingly the new profile had some problems with a hijacked home page. Finally booting firefox in safe mode and disabling all add ons worked.
Note that Firefox is a 32 bit application, so you need to install the 32 bit Flash version if the Flash installer didn't do this automatically.
Did you try to run the Flash installer as Administrator (right-click: run as Administrator)?
You can find the latest Flash player versions for Firefox on this page.
Do you see the Flash player file (NPSWF32_11_X_XXX_XXX.dll) in this folder?
You can also check if the Flash installer has created the registry key that allows Firefox to locate the plugin via a registry scan.
That would indicate that the Flash plugin is installed.
Do you also have the registry key that allows Firefox to find the plugin?
Yes,that is correct.
Try to delete the pluginreg.dat file in the Firefox Profile Folder and maybe addons.sqlite as well to reset the plugin registry databases.
You can use this button to go to the Firefox profile folder:
I exit from ff. I delete pluginreg.dat. I restarted it and ff create another one, but AFP still doesn't work.
Does Firefox find all other plugins that show in the registry screenshot?