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Forum Moderators: incrediBILL
Directly from Mozilla website:
Firefox Preview Release (henceforth refered to as PR) is a Technology Preview. While this software works well enough to be relied upon as your primary browser in most cases, we make no guarantees of its performance or stability. It is a pre-release product and should not be relied upon for mission-critical tasks.
1. Completely uninstall Firefox.
2. Download and install Firefox 1.0 release
3. Create a new profile
The whole upgrade process normally takes me about ten minutes; not bad, all things considered.