A fake Firefox update popup
I was browsing some website but suddenly a popup appeared that I need to update Firefox that was up to date. (That was my second time seeing the same site, so I was careful not to click on yes.)
I thought it was a click bait or virus, so I didn't click on it and I wasn't even able to exit that tab. That tab even opened the 'color picker' application and started running a code by itself.
I could see an extension install by itself. I panicked and shut down my computer.
After a while when I started the computer again, I couldn't find any new extension installed but I remember it was there. ;-;
A few days later (today), all of my websites started glitching! I don't know what to do. T_T
Also if there's an only option which is to refresh, I actually don't want to lose my Firefox data so I can't do that. Is there any other way to get rid of that thing?
To put some screenshots, I tried to use another web browser which I could clear the data of. But it didn't work in that.
This is the link which mentioned some 'Update.FF' (I am not sure if it's the correct one, but please do not click on it.)
**If you do click on it, it'll just refresh the page or something but the previous link which I saw, doesn't open**
Hi, sorry to hear you got hit by that, it does happen from time to time. Sometimes pressing Esc rapidly will close it long enough to give you time to close the tab. This extension is known to help prevent that sort of thing: https://addons.mozilla.org/firefox/addon/ublock-origin
You say you've checked for unknown extensions which is the first place to start. You can also check your Firefox Desktop shortcut for corruption: Right click on it > Properties, and in Target, make sure there is no sign of anything other than Firefox. If there is, delete that part of it. Or if it's easier, you can just delete it and recreate a new shortcut. More: Wrong home page opens when I start Firefox - How to fix.
Another thing you can do, is to search for the malware in your PC's programs - look for any recently installed programs that you don't recognise.
Are other browsers also glitching? If so, it's more likely to be on your PC rather Firefox itself.
You can try these free programs to scan for malware, which work with your existing antivirus software:
- Microsoft Safety Scanner
- MalwareBytes' Anti-Malware
- Anti-Rootkit Utility - TDSSKiller (for more info, see this alternate TDSSKiller download page)
- AdwCleaner (for more info, see this alternate AdwCleaner download page)
- Hitman Pro
- ESET Online Scanner
Note that not all removal programs will detect all malware, so you may need to run several of them.
Further information can be found in the Troubleshoot Firefox issues caused by malware article.
If your question is resolved by this or another answer, please help other users by marking the best reply as Solved. Thank you!