After downloaded the Firefox 27.01 version I checked it for virus.
Avast 8.0.1497
Virus definition 140213-1
Released 2014-02-13 19:17:43
Found: Threat:Win32:Malware-gen inside the plugin-container.exe
New: Zulip (Mar 10, 2026), Platform 30.2 (Feb 17, 2026)
1,400+ portable packages, 1.2 billion downloads
Please donate if you can!
Downloaded a new copy of FirefoxPortable 27.01 from PortableApps and this time Avast did NOT find any malware.
Double checked with latest ClamwinPortable with a virus free result.
First time ever this has happened with software from PortableApps.
Why? No clue...
Be alert. Always.
Best regards.
Steff
Avast's heuristic scanner evidently had a false positive.
See here: https://portableapps.com/support#false_positive