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FIREFOX -virus (worm) after install 31.0 from official site Wtf?

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  • 15 have this problem
  • 4063 views
  • Last reply by Skyhawk

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Hi! I just download and installed firefox 31.0 from official site.After first run my antivirus "Zillya" classified firefox.exe and maintenanceservice_installer as a virus (worm) : Worm.Runounce.Win32.2921 and Worm.Mabezat.Win32.41398 respectively. So since it is understood ?

Chosen solution

If you got Firefox from mozilla.org whether stub or full setup from https://www.mozilla.org/en-US/firefox/all/ then there should be no form of viruses, trojans, malware, ads or such. No version of Firefox for Windows, Mac OSX or Linux has with the exception of a certain locale contrib build like eleven years ago as it was not until Firefox got to version 1.0 that there were other official language builds besides en-US then.

Some antivirus applications give false positives with Firefox related stuff especially depending on timing of Firefox release and new definitions update, especially with the stub installer. There was a post a couple days ago about McAfee giving a false positive with the stub installer of Firefox 31.0. If it was true that Firefox 31.0 for Windows came with a virus it would very likely be a active topic here and on tech sites.

Firefox Setup 31.0.exe en-US Detection ratio: 0 / 50 virustotal results link

Firefox Setup Stub 31.0.exe en-US Detection ratio: 0 / 53 virustotal results link

Read this answer in context 👍 6

All Replies (3)

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I see that you have Firefox 6 installed. You're way overdue for an upgrade. If you installed Firefox 31 from the official site, you shouldn't have any problems. Mozilla downloads are clean

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Chosen Solution

If you got Firefox from mozilla.org whether stub or full setup from https://www.mozilla.org/en-US/firefox/all/ then there should be no form of viruses, trojans, malware, ads or such. No version of Firefox for Windows, Mac OSX or Linux has with the exception of a certain locale contrib build like eleven years ago as it was not until Firefox got to version 1.0 that there were other official language builds besides en-US then.

Some antivirus applications give false positives with Firefox related stuff especially depending on timing of Firefox release and new definitions update, especially with the stub installer. There was a post a couple days ago about McAfee giving a false positive with the stub installer of Firefox 31.0. If it was true that Firefox 31.0 for Windows came with a virus it would very likely be a active topic here and on tech sites.

Firefox Setup 31.0.exe en-US Detection ratio: 0 / 50 virustotal results link

Firefox Setup Stub 31.0.exe en-US Detection ratio: 0 / 53 virustotal results link

Modified by James

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It was just a mistake in antivirus program/