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Multiple Firefox processes in task manager due to Virus/Malware

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  • Última resposta de cor-el

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Hello. About a week ago I have downloaded a malicious file, which, after using, started to open new Firefox windows every few seconds and downloading various programs like amazon app etc. Thus I disabled the internet and then used at least 5 different anti-malware programs as well as couple anti-virus programs that detected and removed various malware. Afterwards, I had no such problems, but I still had some BITSADMIN cmd.exe appearing, after doing some research I found that this is a command line created by the malware, but it seems to do nothing now, as the malware is removed. And then I noticed I have multiple Firefox windows on my task manager, every time, the real one can be recognized by expanding the process, then it shows the open tabs. The "BAD" one though, is always there, starting at about 50MB of memory usage then "growing" up to 300MB+ in some time... I did some more research, uninstalled Firefox, fully, and then reinstalled it, but the problem continues. I do not have any other ideas what to do further, maybe you could assist me with this? Note that I have used all of the most popular and freely/trial based available anti-malware and anti-virus programs.

Hello. About a week ago I have downloaded a malicious file, which, after using, started to open new Firefox windows every few seconds and downloading various programs like amazon app etc. Thus I disabled the internet and then used at least 5 different anti-malware programs as well as couple anti-virus programs that detected and removed various malware. Afterwards, I had no such problems, but I still had some BITSADMIN cmd.exe appearing, after doing some research I found that this is a command line created by the malware, but it seems to do nothing now, as the malware is removed. And then I noticed I have multiple Firefox windows on my task manager, every time, the real one can be recognized by expanding the process, then it shows the open tabs. The "BAD" one though, is always there, starting at about 50MB of memory usage then "growing" up to 300MB+ in some time... I did some more research, uninstalled Firefox, fully, and then reinstalled it, but the problem continues. I do not have any other ideas what to do further, maybe you could assist me with this? Note that I have used all of the most popular and freely/trial based available anti-malware and anti-virus programs.

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In current Firefox releases is multi-process tabs enabled. This means that see more than one Firefox process running (one for the main browser process and one for the content process). You can see this on the "Help -> Troubleshooting Information" page (Application Basics: Multiprocess Windows).

You can disable multi-process tabs in Firefox by setting the related prefs to false on the about:config page.

  • browser.tabs.remote.autostart = false
  • browser.tabs.remote.autostart.2 = false

See also: