Some interesting Firefox and Thunderbird plugins

Firefox

• Adblock Plus
• Dictionary Switcher
• British English Dictionary
• Firebug
• Xmarks
• German dictionary
• Find a module to save plugin configuration
• Weave to synchronize bookmarks, passwords, and plugins?

Thunderbird

• Dictionary Switcher for Thunderbird
• British English Dictionary
• Wörterbuch Deutsch (de-DE), Hunspell-unterstützt
• Zindus: adress book to Google