I recently upgraded to Firefox 47.0. I don't know when Flash last updated, it does its thing automatically, but before I uninstalled it again it was v22.0.0.192.
I also added a new Greasemonkey script, but it didn't involve Flash at all.
It seemed to work fine on Internet Explorer, but I wasn't sure whether to mention that because Firefox is NPAPI and IE is ActiveX.
I've also got the same version of Firefox, Flash, and I put the same Greasemonkey script set up on my laptop, and it doesn't have any issues. It's only a problem on my desktop.
The most recently updated Firefox plugin was "Widevine Content Decryption Module provided by Google Inc." I have no clue what that is or what it does, but it came in on June 12, about a week before I started having these problems.
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I also added a new Greasemonkey script, but it didn't involve Flash at all.
It seemed to work fine on Internet Explorer, but I wasn't sure whether to mention that because Firefox is NPAPI and IE is ActiveX.
I've also got the same version of Firefox, Flash, and I put the same Greasemonkey script set up on my laptop, and it doesn't have any issues. It's only a problem on my desktop.
The most recently updated Firefox plugin was "Widevine Content Decryption Module provided by Google Inc." I have no clue what that is or what it does, but it came in on June 12, about a week before I started having these problems.