Upgrading from Firefox 1
This article is no longer maintained, so its content might be out of date.
This article describes how to upgrade Firefox version 1.0 or 1.5.
No matter which version you are upgrading from, the easiest way to upgrade to Firefox 3 is to simply install it from the mozilla.com website. Your bookmarks and other settings will be carried over automatically.
For details, see Install Firefox on Windows.
For details, see Install Firefox on Mac.
For details, see Install Firefox on Linux.
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