hi, i'm not sure if this is related to firefox in particular. if you are having troubles installing a particular piece of software please get in contact with its vendor directly to get technical support.

it is in the settings that much i know a few months ago i had them working just fine because i was able to download and install them just fine but in a few days i would get messages that they could not load because major files where missing that was after windows updates or mozillas i dont know where the setting is or what it is.