Up & Coming Extensions

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MM3 Proxy Switch Requires Restart

In the Firefox Browser (and other Mozilla programs) you can per default configure only the setting for one internet connection. With this Proxy Switch you can manage different configurations and simply switch over between these.

Rated 4 out of 5 stars (39)
3,909 users

Dorando keyconfig Requires Restart

A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)

As of version 2016.2, Custom keys (using custom JavaScript) work again!

Rated 5 out of 5 stars (27)
8,059 users

Extension List Dumper Requires Restart

This extension adds a button ("Dump list") to the Add-ons window. When this button is pressed, a new window is opened with the list of installed extensions, themes or plugins...

Rated 4 out of 5 stars (121)
2,182 users

IMAP Received Date Requires Restart

Make the “Received” column in IMAP folders show when messages were actually received.

Rated 5 out of 5 stars (6)
1,883 users

Clean Subject Requires Restart

"Clean Subject" cleans the subject from multiple occurrences of subject prefixes such as ("Re: Re-2: Re:") and postfixes that are inserted by other clients. Words like "[SPAM]" can be cleaned as well. These prefixes can be defined in the preferences.

Rated 4 out of 5 stars (38)
3,120 users

New Mail Attention Requires Restart

This addon calls attention to main window on new message arrival.

Rated 4 out of 5 stars (46)
4,989 users

Super Date Format Requires Restart

Fully customize the date format of the Date/Received column.

Rated 4 out of 5 stars (11)
2,716 users

Search as list Requires Restart

Search results appear as list (as per the "Open email as list" button).
- return to facet view with shift+close [x]
- auto open list view when few results found
- column config./sort/toggle [IMG3&4]
- apply columns to search as list menu [IMG5]

Rated 5 out of 5 stars (27)
2,463 users

Password Tags Requires Restart

Adds metadata and sortable tags to the password manager.

Rated 5 out of 5 stars (12)
1,479 users

ProfileSwitcher Requires Restart

It adds some options to launch easily other profiles and the Profile Manager.

Rated 4 out of 5 stars (87)
25,736 users

NestedQuote Remover Requires Restart

Remove nested quotes when replying to a...

Rated 3 out of 5 stars (16)
2,151 users

Calendar Tweaks Requires Restart

Allows several tweaks to the Thunderbird/Lightning calendar user interface including new selection styles and repeating event icons. Mimics the colors and styles found in MS Outlook.

Rated 4 out of 5 stars (47)
13,316 users

ThunderBirthDay Requires Restart

Display birthdays from the Thunderbird addressbooks as events in Lightning.

Rated 4 out of 5 stars (85)
15,683 users

ShowIP Requires Restart

Show the IP address of the current page in the status bar. It also allows querying custom information services by IP (right click) and see location and avaiable vouchers for shopping sites. Additionally you can copy the IP address to the clipboard.

Rated 3 out of 5 stars (277)
25,345 users

Use Bcc Instead Requires Restart

Who among us has not made the mistake of sending a 'broadcast' email to a large number of recipients without using BCC; thereby revealing everyone's email addresses to all? This simple add-on attempts to prevent this from occurring.

Rated 5 out of 5 stars (23)
4,057 users

Remove Duplicate Messages Requires Restart

If you have duplicate messages (e.g. from merging folders or downloading messages several times) you can use this tool to find and remove them from the selected folder and its subfolder by rightclicking on a folder and choosing "Remove duplicates..."

Rated 4 out of 5 stars (136)
42,566 users

Developer Assistant Requires Restart

A suite of tools for developers.

Rated 4 out of 5 stars (46)
1,528 users

Dictionary Switcher Requires Restart

Toggles dictionaries automatically or manually and displays the currently selected one

Rated 4 out of 5 stars (173)
12,855 users

ThunderHTMLedit Requires Restart

Thunderbird HTML editor. This add-on adds a HTML tab to the composition window where you can see and edit the HTML source of the message.

Rated 5 out of 5 stars (5)
1,839 users

Free/Busy Requires Restart

Publish free/busy calendar file (*.ifb) via ftp or to a file. View other people's free/busy info in meeting organizer window. Integrate Thunderbird and Outlook calendars without Exchange server.

Rated 3 out of 5 stars (13)
1,182 users