Try one of these articles:
- Install Firefox on Linux This article will show you how to install Firefox on Linux.
- How to download and install Firefox on Mac This article explains how to download and install Firefox on a Mac.
- Profiles - Where Firefox stores your bookmarks, passwords and other user data Firefox stores your personal information and settings in a profile folder. Find out what is in your profile and how to locate it.
- Uninstall Firefox from your computer This article describes how to remove the Firefox application from your computer and also how to remove the personal information that Firefox stores.