GPO install of FP for Firefox works but FP is not activated after the installation

Hello,

as the title says, I've been installing the Flah Player 32 NPAPI per GPO from our Windows Server 2016 and the installation works fine (I can see it being installed on our Windows 10 workstation in appwiz.cpl), but Flash Player is inactive in Firefox. I've tried installing it through Software Installation and through a batch file with same results.

If I install it manually on the workstation it works like a charm. But after the installation I suddenly have two NPAPI installations in appwiz.cpl. Funny thing is, that it seems to be the same version, but the .msi is 1 MB bigger than the installation through the Website.

Anyone know something about this issue? Everything worked with NPAPI 31, but I don't really want to settle down with an old version of Flash...

Thanks in advance!