(for any tech support reading this, there's already a ticket open - number 2017110902440003 - I was just told that because it was free, the forums was my best bet for an answer)
I was downloading some software (that, while I knew would be flagged down by the antivirus and would need to be excluded, I knew were safe files from a safe source). Specifically, game trainers that modify software memory.
However, in the aftermath of BitDefender trying to intercept it, it also quarantined the following completely unrelated and safe items:
-firefox.exe and pingsender.exe from Program Files (x86)/Mozilla Firefox. It attempted this at least 5 times.
-The shortcut .lnk files to Firefox
-cmd.exe in Windows/SysWOW64. I don't even know why.
-A save file, and backup save file, from the game I was downloading software from.
-Several profile/cache files from the Firefox app data folders.
-conhost.exe from Windows/System32 (!!!) (it attempted this twice)
Anyone ever saw anything like this? Or could have any clues as to what's going on?