This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Virustotal spots firefox as unsafe on windows installer.

  • 3 replies
  • 5 have this problem
  • 1 view
  • Last reply by DonMur

DonMur
DonMur
more options

Hi, Cylance* at VirusTotal** shows Firefox as unsafe. Well, even so I kept on and installed it om my Windows PC. A long story short, my machine started to use CPU at its peak for a time, my PC started working in sluggish manner and turned off by itself after a while. I've got my machine back to life from a previous backup. To make sure Virustotal's result I went back on Linux to see and the result is the same.

PS - I'm on Linux now just to be safer.

Hi, Cylance* at VirusTotal** shows Firefox as unsafe. Well, even so I kept on and installed it om my Windows PC. A long story short, my machine started to use CPU at its peak for a time, my PC started working in sluggish manner and turned off by itself after a while. I've got my machine back to life from a previous backup. To make sure Virustotal's result I went back on Linux to see and the result is the same. PS - I'm on Linux now just to be safer. * https://www.cylance.com/en_us/home.html ** https://www.virustotal.com/#/file/30ce0aa99c8d01e819aeb66e57f9074bcbc5a010a961560fafc87a631251454d/detection

Chosen solution

So, must be a coincidence...anyhow, my machine is running fine again without FF and by your response it won't be on it anymore. Just on Linux.

Read this answer in context 👍 2

All Replies (3)

WestEnd
WestEnd
more options

I highly doubt FF is unsafe. If that was the case there would've been more to be had out there but that isn't the case here.

James
James
  • Moderator
  • Top 10 Contributor
more options

Every Firefox setup I tried in the last months has pretty much had Cylance claiming the file is unsafe when every other scanner is green. But I would not trust Cylance in this case as it's detecting used on site is different from the application. False Positives can happen and Cylance may just continue to be in error.

DonMur
DonMur Question owner
more options

Chosen Solution

So, must be a coincidence...anyhow, my machine is running fine again without FF and by your response it won't be on it anymore. Just on Linux.