bunch of other plugins

Hello, I have been using Firefox ESR for several years on my Win7 x64. I recently tried installing Firefox x64, which started causing weird issues with plugins being loaded or not loaded depending on which Firefox I ran, so I uninstalled the x64 one. Now, when I try to run Battlefield 4, it keeps prompting me to download and install the plugin in Firefox, regardless of how many times I install it. I looked in registry and I see a key there HKLM\SOFTWARE\MozillaPlugins\@esn/npbattlelog,version=2.7.1 So everything should be good, but it's not. When I go into Tools->Add-ons, Plugins, I don't see the plugin listed. When I look into my profile, I see a file "pluginreg.dat" which contains the following: Generated File. Do not edit. [HEADER] Version|0.17|$ Arch|x86_64-msvc|$ [PLUGINS] [INVALID] C:\Program Files (x86)\Battlelog Web Plugins\2.7.1\npbattlelog.dll|$ 1430384048000|$ ... bunch of other plugins How do I make the battlelog plugin valid? This is getting rather frustrating... Thanks, Alex