Long history, but this (while half awake/half sleep) I was browsing (I use Mozilla because I needed the zotero plug in). Then, my tab showed a message indicating that a new update was available... of course very stupidly I say UPDATE... few seconds, while the updating was running" latter I realized my mistake, this was not a mozzila update, I closed the window and inmediatly I looked into the antivirus
(I have webroot secure anywhere, ), I scanned the computer and nothing was dectected; so check if something was isntalled (Windows 10/ Programs/) and I saw that something was installed this am, so I unisntalled.... my concern is that in theory, webroot have to 1) informed when a website was suspicios 2) detect (warned me or something) that I was downloading/installing something dangerous; but it did not. The scan did not detect anything wrong.
So far, I did not noticed anything wrong but it could be that my info, passwords or whatever personal information that was in browser is being sold...
So, HOW do I know that for sure everything is OK.
the file I by mistake installed was "firefox-patch.js"