Firefox 1

Firefox 1 (en-US) 21.0

Legacy version of Firefox that's no longer supported

WARNING: This is a very old version of Firefox. View full description


WARNING: This is a very old version of Firefox.

To download the most recent stable release, click here.

We'll leave this one up for a while in case advanced users would like to download it for other purposes!

Firefox 1


Firefox 1 (en-US) 21.0

User reviews about Firefox 1

  • CygnusCentauri

    by CygnusCentauri


    Just an outdated version of Firefox. Try the latest version if you want the best. More.

    reviewed on December 10, 2015

  • RobertAlfon

    by RobertAlfon

    "Best browser of all."

    I like it alot, it's fast, reliable, and secure. It shows all websites properly, unlike any other internet browser. More.

    reviewed on February 23, 2012

  • smurray

    by smurray


    Whatever Microsoft do with the next version of IE, there´s no way it´s going to come close to FF. Apparently Microsoft h... More.

    reviewed on October 31, 2005