Do you know where you downloaded to update from?? (URL ADDRESS please) if not I can help you fix the problem and virus (no worries) Email : not on this forum you don't And I can send you instructions on how to update malware signatures , etc.

edited by a moderator - please see your inbox

Likely a false positive, especially if if you updated your definitions recently.

No official install or update for Windows, Mac OSX or Linux from mozilla.org have yet to be proven to have any form of malware, virus, trojan, toolbars, applications bundled in or such.

A way to help prove that is if it was ever true it would be a very hot topic here, on mozillazine forums, tech forums and tech sites.

What locale are you using? as I uploaded en-US of both stub and full setup for Windows to virustotal. Was the first to analyze them.

Firefox Setup Stub 33.0b8.exe en-US Detection ratio: 0 / 55 https://www.virustotal.com/en/file/9278dcf8d8ceb654bc6c5fa1ed3c1e48b36d4a0b990d26672cf8e247b2703fa2/analysis/1412112432/

Firefox Setup 33.0b8.exe en-US Detection ratio: 0 / 55 https://www.virustotal.com/en/file/dfa197736787f9a59fcdf450f254f31c8f042a529d8520e30be4cf8dbbf0dee8/analysis/1412112728/

If you think you need it;

Download Firefox Full Installer For All languages And Systems {web link}

Fred, the OP is testing the Beta builds (currently at 33.0b8) and not using the Release which is 32.0.3

https://www.mozilla.org/en-US/firefox/beta/all/