Up & Coming Extensions

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YouTube Downloader and Converter

Easy to Download YouTube Videos in FLV and MP4 and Convert to MP3,AVI etc.

Rated 5 out of 5 stars (2)
15,183 users

S3.Menu Wizard

Customize menus : Helps removing, moving and renaming menus and menu items
Support: Firefox, Thunderbird and SeaMonkey

Rated 5 out of 5 stars (15)
1,795 users

Close Proxy Authentication

Provides transparent proxy authentication on your enterprise network.
Close authentication dialog if login on proxy failed.

Rated 5 out of 5 stars (2)
1,703 users

DontPhishMe

DontPhishMe is an Anti-Phishing addon for Mozilla Firefox which utilizes the pattern matching techniques to provide the Malaysian Internet user with information and notification to protect them against online banking phishing website.

Not yet rated (2)
1,263 users

Awesome Auto Archive No Restart

Automatically do Archive/Copy/Delete/Move actions based on user defined rules

Rated 5 out of 5 stars (10)
1,957 users

WebODF No Restart

Viewer for OpenDocument Format office files. It can display documents saved from LibreOffice, OpenOffice, Calligra, Abiword, Microsoft Word, Excel, PowerPoint. The documents should be saved in the OpenDocument Format.

Rated 5 out of 5 stars (5)
1,484 users

Join-NG

Join partial messages. Somewhat similar to MS Outlook Express "combine and decode".

Rated 5 out of 5 stars (1)
1,006 users

RefControl

Control what gets sent as the HTTP Referer on a per-site basis.

Rated 4 out of 5 stars (151)
101,641 users

Fireclam

Use ClamAV to scan Firefox downloads for viruses.

Rated 4 out of 5 stars (36)
3,696 users

Send Filter

This add-on allows you run your message filters automatically on outgoing messages after sending. In other words, it's a outgoing filter for thunderbird and seamonkey.

Rated 4 out of 5 stars (32)
4,943 users

CookieKeeper No Restart

Extended Cookie Manager - Keep only wanted cookies.

Rated 4 out of 5 stars (14)
8,602 users

quickFilters

Quickly generate mail filters on the fly, by dragging and dropping mails and analyzing their attributes. Create a filter in less than 10 seconds, it's as easy as: drag, click, click.

Now supports easy merging of filters.

Rated 5 out of 5 stars (9)
7,057 users

Year view

Year view for calendar.

Rated 4 out of 5 stars (42)
4,030 users

SmartTemplate4

SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.

Rated 5 out of 5 stars (42)
15,063 users

Addressbooks Synchronizer

Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers

Rated 4 out of 5 stars (55)
31,279 users

Mail Redirect

Allow to redirect (a.k.a. "bounce") mail messages to other recipients

Rated 4 out of 5 stars (106)
27,578 users

Rikaichan Japanese-German Dictionary File

A dictionary file for Rikaichan.

Rated 5 out of 5 stars (1)
3,300 users

XNote++

Persistent sticky notes for Thunderbird associated to mails.
This is a port to Thunderbird >= 3 and Seamonkey >= 2 based on XNote 2.1.0 ( https://addons.mozilla.org/en-US/thunderbird/addon/3093 ) with bugfixes and additional features.

Rated 5 out of 5 stars (53)
19,649 users

Silent Block

Minimum and fast URL blocking by regular expressions.

Rated 5 out of 5 stars (15)
5,351 users

New Mail Attention

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

Rated 4 out of 5 stars (34)
8,287 users