I know this might not be a Firefox issue but rather a Flash issue, but maybe it's a know problem or somebody recognises something which can lead to a solution. I have Fir… (read more)
I know this might not be a Firefox issue but rather a Flash issue, but maybe it's a know problem or somebody recognises something which can lead to a solution.
I have Firefox 62.0.3 64 bits on Windows 10 Pro 64-bits (v1803). With nPapi plugin version 29 everything worked fine. It looks like after installing the newest nPapi flash plugin (v31) thing got messy. However the cause could also be something else.
When starting Windows in safe mode. Everything works fine, flash and firefox. In safe mode I can also uninstall and install the Flash plugin.
I normal mode, the Flash plugin gives problems, loads very very slow and white screens appear, nothing works, no flash games and also not the flash test page on the Adobe site. Also, it's not possible to either uninstall or install the Flash player plugin. It does not matter if I use the seperate Flash uninstaller (as administrator) or the normal uninstall. And when installing it goed up to 90%, keeps there several minutes and then says that the installation failed. Seen no errors in the install log of Flash and as said, in windows safe mode 0 issues.
I disabled all security (Emsisoft Anto Malware and Windows Defender are running) in normal mode. Only things still running (in the taskbar) are MSI Live update and something else. Realtek Audio config, and several things of Acronis True Image, however active protection is not active. I also already scanned with ADWCleaner and Malware Bytes additionally but no malware was found. And as a last resort I uninstalled flash plugin (in safe mode) then back to normal, refreshed Firefox to factory settings, went back to windows safe mode to install flash again (worked fine, Adobe site and games too), restarted to normal mode and problem occurs again. Since Firefox works without problems when not using flash, I also installed my other addons again (ublock, empty cache and nimbus screenshot).
I also have IE, Edge and Chrome present on my system, they do not have this issue. But they don't use the npapi plugin so that doesn't wonder me a lot.
Does anybody know what could cause this behaviour.