I don't remember details, it happened already some time ago. It was actually quite sophisticated malware - heavily obfuscated, assembling itself from pieces sp

I don't remember details, it happened already some time ago. It was actually quite sophisticated malware - heavily obfuscated, assembling itself from pieces spread all around the world, jumping through several hoops of compromised servers. When I finally managed to reverse engineer to JS code that carried the infection, it was full of functions I didn't even know existed. Not usual JS, more like API hooks to the underlying platform, with special prefixed names. These names indicated it was about plugins. BTW it was multiplatform, attacking not just Firefox, there was a browser detection and browser specific code paths for several popular browser. I remember there was also something trying to use Silverlight. Oh, and it was multipurpose. Besides trying to infect your PC with a malware, it was also earning money. Some parts of JS were loading ads in invisible frames, presumably to be part of some distributed click farm.