I'll just have to chip away at this,
btw what OS version and bitness are you running?
32 Bit XP ... slightly weakened over time by age and stuff. : )
But a clue is that these attacked my "main Firefox" series of browsers, that for a long while I used for almost nothing, and just that day I went to look at something and "poof - attacked". All my heavy duty is on Pale Moon, and it's just fine.
I see conflicting reports on the web about it. One thought it could even collect user data like logins and passwords to sites. So I have currently just dumped the links in a folder marked "beware".
I tried downloading one "tool to remove it" but I stopped it before it was finished, after I wasn't sure if it was hung up.
The steps I saw varied, with one of the more complex involving downloading something like five anti-malware programs.