Top-Rated Extensions

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Year View

This is an example extension that adds a simple year view to Sunbird/Lightning.

Note that freebusy information is only provided if all calendars are cached. See long description for more info. Also, Calendar 1.0pre with bug 489590 fixed is required.

Rated 2 out of 5 stars (5)
18 users

CrowdMailer

Find email addresses in unformated text and create a mail with them. Use it to easily create mails with many recipients and/or to extract addresses out of formats like: "Sherlock Holmes (s.holmes@hotmail.com)"

Rated 3 out of 5 stars (1)
243 users

Tabbed Mail Preferences

Enhances control over some aspects of tabbed mail browsing.

Rated 2 out of 5 stars (2)
3 users

Boomerang

Boomerang E-Mail is an Add-on for the Thunderbird E-Mail-Client and is based on the Boomerang e-Mail algorithm (patent pending).

It provides functionality to send a certain e-mail (including attachments) to several recipients one after the other and...

Rated 2 out of 5 stars (4)
6 users

Nightly Tester Tools Lite

This is a cut down version of Nightly Tester Tools by Mossop, which is 77.6 KB. I've only included the "copy build id" and "build id in titlebar"...

Rated 2 out of 5 stars (8)
155 users

Purge Events

Purge events from Sunbird and Lightning calendars

Rated 2 out of 5 stars (6)
207 users

Test Pilot for Thunderbird No Restart

Add-on has now been discontinued, see below.

Rated 1 out of 5 stars (15)
8,166 users

DOM Inspector - Mac OS X

Inspect the DOM of HTML, XUL, and XML pages, including the mail...

Rated 2 out of 5 stars (1)
2 users

forcebutton

This add-on can resend mails, so you "force" the other side to answer. It could be useful at corporate environment.

Rated 2 out of 5 stars (1)
43 users

CALDAV - Search/Subscribe

Add CalDAV search & subscribe feature to Lightning

Rated 1 out of 5 stars (5)
2,436 users

Re: Sort

「Re2:」「Re4:」というふうに「Re:」をまとめます。

Rated 2 out of 5 stars (1)
28 users

Cairo-Dock unread messages

Displays the number of unread messages in all inboxes on your dock.

Rated 2 out of 5 stars (1)
349 users

BccInfo

Send any additional information to your BCC recipient.

Rated 2 out of 5 stars (2)
74 users

Reverse Phone Number Identification

Reversed search phone numbers.

Rated 2 out of 5 stars (2)
51 users

Thunderbird Pedophile Reporter

This add-on was created to allow anyone that is contacted by a suspected pedophile or suspected predator. This will gather the header information and send it to our servers to be reviewed by an investigator.

Rated 1 out of 5 stars (3)
45 users

WhatsApp Helper No Restart

Useful for WhatsApp.

Rated 1 out of 5 stars (3)
661 users

ePhotoUploader

ePhoto Uploader is a Mozilla/Firefox addon to allow you to upload any image on websites you're browsing to your ePhotoBay account by just one click. For the addon to work a free ePhotoBay account is required.

Rated 1 out of 5 stars (2)
174 users

Reply All Control

Allows you to disable the ability to use Reply All when your email address does not appear in the To: or CC: fields. This usually means you've been BCC'd and Reply All might reveal the sender's sinister plot.

Rated 1 out of 5 stars (2)
14 users

Splash! (Compatible version of Firefox 4)

Adds a splash screen. Supported in Firefox, Flock, Thunderbird, Sunbird, eMusic Remote, Songbird and Sunbird.

Rated 1 out of 5 stars (2)
35 users

Colorify Unread Watched NNTP

Colorizes names of newsgroups that have watched threads with unread messages.

Rated 1 out of 5 stars (2)
7 users