• INTRO
• ABOUT THUNDERBIRD
• ABOUT THIS MANUAL
• HOW EMAIL WORKS
• EMAIL ETIQUETTE
• INSTALLATION
• WINDOWS
• OSX
• OTHER LINUX DISTRIBUTIONS
• WHAT IS FLOSS?
• REMOVING THUNDERBIRD
• SWITCHING TO THUNDERBIRD
• MIGRATING!
• UBUNTU
• MIGRATING FROM PREVIOUS VERSIONS
• ACCOUNT SET UP
• BASIC USAGE
• INTERFACE
• GETTING MAIL
• COMPOSING MESSAGES
• READING AND ORGANIZING MAIL
• SEARCHING AND FILTERING MESSAGES
• ARCHIVING MESSAGES
• ADDRESS BOOK
• ADDRESS BOOK BASICS
• SECURITY
• SECURITY OPTIONS
• BEYOND THE BASICS
• KEYBOARD SHORTCUTS
• TAGGING AND MARKING
• RSS
• FILTERS
• USEFUL TIPS AND TRICKS
• ACTIVITY MANAGER
• UNIFIED FOLDERS
• ADD ONS
• OVERVIEW
• USING THE ADD-ON MANAGER
• ENABLING AND DISABLING ADD-ONS
• THUNDERBROWSE
• LIGHTNING
• THUNDERBIRD CONVERSATIONS
• ATTACHMENT REMINDER
• THREADVIS
• SIGNATURE SWITCH
• APPENDIX
• GETTING SUPPORT
• TROUBLESHOOTING
• CREDITS

OVERVIEW

Add-ons are small programs the you can add to Thunderbird to extend its capabilities. There are literally dozens of add-ons available for Thunderbird. What can add-ons do? Here are some examples of the available add-ons:

• Contacts Sidebar, which displays your contacts in a new pane in the Thunderbird window.
• Signature Switch, which lets you easily switch between email signatures (say, because you have multiple email addresses).
• Mail Merge, which lets you send bulk email. 

 Obviously, we can't cover every add-on in this manual. But we will be looking at the following ones:

• Thunderbrowse
• Lightning
• Thunderbird Conversations
  
• Attachment Reminder
• Threadvis
• Signature Switch
  

 But before we get to the extensions, let's take a look at how to add and manage them.