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Portable Firefox 138.0.3 / 139.0 Beta 1

Developed by John T. Haller - Windows - setup file FirefoxPortable_138.0.3_English.paf.exe (145.05 MB) - Freeware

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MD5: 85ab003474f4230639d722bc1498cdc9

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Quick Review

"A fully functional solution of Firefox."

Firefox comes in many different shapes and forms, you have the desktop version, the mobile version, and now you have Portable Firefox. Simply move the portable firefox browser on to your USB drive and bring it with you anywhere you go. If you're an IT professional who works on multiple computers through the day, you can use this to ensure you always have Firefox when working. This version is specially optimized to perform fast even when executed from a portable flash drive. Additionally, you could install it onto a CDRW Drive, Zip Drive, External Hard Drive, MP3 Player, or Flash card. As with every other version of Firefox, Portable Firefox is completely free to use.

Key Features of Portable Firefox:

Use firefox on the go, install to a USB drive, memory card, external drive, or any other portable device
Optimized for fast performance even when opened on a slow drive
Free to download and use!

Antivirus information

Download3K has downloaded and tested Portable Firefox on 15 May 2025 with some of Today's best antivirus engines and you can find below, for your convenience, the scan results:

Avast:
Clean
Avira:
Clean
Kaspersky:
Clean
McAfee:
Clean
NOD32:
Clean