Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

Downloaded Firefox Installer seems to be from 2018

  • 3 replies
  • 0 have this problem
  • 1 view
  • Last reply by TS

TS
TS
more options

I‘m somewhat uncertain: I downloaded the Firefox Installer from (I believe) Mozilla.org via Edge. When I tried to Upload the file to VirusTotal I got errors first and it only worked after restarting the laptop.

The file hadn‘t been analyzed so far (which surprised me), 1 out of 72 scanners claimed to have found a Trojan but what bothered me more was that according to VirusTotal the file was compiled in 2018 with Microsoft Visual C/C++ 12.00.8168. It was also somewhat smaller than the last Installer I downloaded (342kb vs. 390kb), although both should be version 18.05.

So I‘m a little concerned if the downloaded file is legitimate?

I‘m somewhat uncertain: I downloaded the Firefox Installer from (I believe) Mozilla.org via Edge. When I tried to Upload the file to VirusTotal I got errors first and it only worked after restarting the laptop. The file hadn‘t been analyzed so far (which surprised me), 1 out of 72 scanners claimed to have found a Trojan but what bothered me more was that according to VirusTotal the file was compiled in 2018 with Microsoft Visual C/C++ 12.00.8168. It was also somewhat smaller than the last Installer I downloaded (342kb vs. 390kb), although both should be version 18.05. So I‘m a little concerned if the downloaded file is legitimate?

All Replies (3)

TS
TS Question owner
more options

As an addition, the file is named 7zS.sfx.exe while the last time it was named 7zSD.sfx.

James
James
  • Top 25 Contributor
  • Moderator
more options

There are a few antivirus clients on VirusTotal that tends to have the occasional false positives over the years due to 7-Zip being used. More so with the small online stub installer vs the full offline setups for Windows even though 7z was used for a looooong time now.

If you download from say mozilla.org page with a browser on Windows, then you will likely get served the small online stub installer.

You can get the full offline setups of current Firefox Release for Windows from https://www.mozilla.org/firefox/all/#product-desktop-release and from https://archive.mozilla.org/pub/firefox/releases/120.0.1/win64/

TS
TS Question owner
more options

Thanks for your reply.

Yes, it definitely was the online Installer. I was mainly concerned why VirusTotal said the file was compiled in 2018 and the file differs from the last Installer I downloaded although both claim to be version 18.05.

Are there possible legitimate reasons for that?