Support:Article list

Reference Charts

• toolbar items (w/icons)
• menu reference
• options reference
• keyboard shortcuts
• mouse shortcuts

Feature Tutorials

• how to use tabbed browsing
  • open a new tab
  • open links in new tabs
  • bookmark a group of tabs
  • use a group of tabs as the homepage
  • rearranging tabs
• how to configure the pop-up blocker
• how to use live bookmarks / web feeds
• how to use the spell checker
  • downloading and setting dictionaries
• how the change themes
• explain search engines, and how to add/remove search engines
• smart keywords
• text zoom
• safe mode
• profiles

How-to articles for basic tasks

• installing Firefox on Windows
• installing Firefox on Mac
• installing Firefox on Linux
• uninstalling Firefox on Windows
• uninstalling Firefox on Mac
• uninstalling Firefox on Linux
• upgrading Firefox
• importing data
  • Internet Explorer
  • Safari
  • Opera
  • Netscape
  • SeaMonkey
  • Mozilla
• exporting data
  • Internet Explorer
  • Safari
  • Opera
  • Netscape
  • SeaMonkey
  • Mozilla
• backing up / restoring data
• installing add-ons
• how to make Firefox the default browser
• how to customize the toolbar
• how to set the homepage
• how to bookmark pages
• how to create bookmark folders
• how to organize bookmarks
• explain search suggestions, and how to turn it off
• explain private info, and how to clear it

Troubeshooting

(haven't started compiled it yet, but Chris Hofmann created a list here)