Add-ons
Miscellaneous
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Lightning
Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.
6,816,663 users
Most Popular See all »
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Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.6,816,663 users -
Allows bidirectional access to Google Calendar308,197 users -
German Dictionary (new Orthography) for spellchecking in Mozilla products220,112 users -
True "Send Later" functionality to schedule the time for sending an email.72,589 users
Top Rated See all »
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Add menu commands for replying to multiple messages at the same time.591 users -
True "Send Later" functionality to schedule the time for sending an email.72,589 users
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Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Version 3.0 also includes sorting buttons. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.23 users
Recently Added See all »
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Lightweight add-on that automatically copies any highlighted text to clipboard.4 users
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Enables toggling of replied, forwarded, and redirected states of messages.291 users
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Add menu commands for replying to multiple messages at the same time.591 users
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With MyAdFilter, free content creators propose you only one ad. Apart from those, as your usual ad-blocker, MyAdFilter disables all ads.16 users
See all 179 extensions in Miscellaneous »
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