Are you on Windows? If yes, then get it from here: <removed unofficial random download ink>

Hope it helps :)

Firefox 3 point what?

Firefox 3.0.19, 3.5.19, 3.6.28 are all very old and vulnerable now. They should not be used as a primary browser especially.

Firefox 37.0.1 and 31.6.0esr are the only up to date versions for security currently.

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

Do you need an older version to access a specific website (link)?

Do you get an error message?

Can you attach a screenshot if you get an error message?

• http://en.wikipedia.org/wiki/Screenshot
• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

• Use a compressed image type like PNG or JPG to save the screenshot
• Make sure that you do not exceed the maximum size of 1 MB

Note that there are legacy portable Firefox versions if you really need an older version.