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DKIM Verifier Requires Restart

Verifies the DKIM-Signature of an e-mail.

Rated 4 out of 5 stars (16)
4,589 users
Updated July 23, 2017

MailHops Requires Restart

MailHops maps the route an email took to get to you. Displaying the senders location, weather, user-agent and authentication used.

Rated 4 out of 5 stars (25)
2,525 users
Updated July 22, 2017

Custom Address Sidebar Requires Restart

Allow you to help address sidebar more useful.

Rated 4 out of 5 stars (9)
3,949 users
Updated July 22, 2017

CardBook Requires Restart Featured

A new Thunderbird address book based on the CardDAV and vCard standards.

Twitter: @CardBookAddon
Forum: https://cardbook.6660.eu/

Rated 5 out of 5 stars (99)
14,375 users
Updated July 21, 2017

Markdown Here Requires Restart

Write your email in Markdown, then make it pretty. NOTE: This is the legacy XUL version, for Thunderbird, Postbox, Pale Moon, etc. *Not* for modern Firefox; for that use this: https://addons.mozilla.org/en-US/firefox/addon/markdown-here/

Rated 5 out of 5 stars (28)
7,038 users
Updated July 21, 2017

AdNauseam

Fight back against advertising surveillance

Rated 4 out of 5 stars (35)
9,382 users
Updated July 21, 2017

AutoConfiguration Hook Requires Restart

Provides ability to create E-mail accounts for specific ISP via the account creation wizard.

Not yet rated
4,763 users
Updated July 21, 2017

Full Web Page Screenshots (♥♥♥♥♥) Requires Restart

FireShot makes full web page screenshots. Demo: http://bit.ly/RlBQMV

Screenshots can be quickly captured and:

― Saved as Image or PDF
― Sent to clipboard
― Printed
― Annotated *
― Uploaded *
― E-Mailed *

* OS Windows only

Rated 5 out of 5 stars (504)
235,760 users
Updated July 21, 2017

TORPEDO - TOoltip-poweRed Phishing Email DetectiOn Requires Restart

TORPEDO ist ein Tool zum Erkennen von betrügerischen Links (Phishing). Bewegen Sie die Maus über einen Link in einer Email. TORPEDO zeigt Ihnen die tatsächliche Webadresse in einem Tooltip an und hilft Ihnen, diese zu untersuchen.

Rated 4 out of 5 stars (4)
1,124 users
Updated July 20, 2017

uBlock Origin

Finally, an efficient blocker. Easy on CPU and memory.

Rated 5 out of 5 stars (1,941)
3,816,521 users
Updated July 19, 2017

Emoji Requires Restart

Add emojis to your e-mails.

Rated 5 out of 5 stars (5)
6,951 users
Updated July 18, 2017

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 5 out of 5 stars (6)
715 users
Updated July 16, 2017

Signal Spam Requires Restart

Ajoute une fonction pour signaler, en un clic, les e-mails que vous considérez comme indésirables ou frauduleux à Signal Spam.

Rated 3 out of 5 stars (25)
8,109 users
Updated July 15, 2017

GPO support For Firefox and Thunderbird

Firefox and Thunderbird extension to manage user preferences and user profile CA certificates using group policy

Rated 4 out of 5 stars (12)
24,461 users
Updated July 14, 2017

Message Title Header

Show a title header above messages.

Not yet rated
4 users
Updated July 14, 2017

Silent Block

Minimum and fast URL blocker.

Rated 4 out of 5 stars (27)
4,133 users
Updated July 14, 2017

Awesome ldapInfoShow

Show contact photo and other info from Local Dir, Addressbook, LDAP, Facebook, LinkedIn, Flickr, Gravatar etc

Rated 4 out of 5 stars (10)
1,421 users
Updated July 13, 2017

Nextcloud for Filelink Requires Restart

"Nextcloud for Filelink" is an Open Source Thunderbird extension which makes it easy to send large attachments with Thunderbird by uploading them first to a Nextcloud server and by then inserting the link into the body of your email.

Rated 3 out of 5 stars (21)
3,313 users
Updated July 13, 2017

adaware ad block

By blocking annoying ads and nosy trackers, adaware ad block nearly doubles your browsing speed! And with the most robust antivirus-level cloud-scanning technology of any ad blocker on the market, you’ll be safe from the latest cyber-threats.

Rated 4 out of 5 stars (56)
75,636 users
Updated July 13, 2017

Persona Switcher Requires Restart

Quickly switch between your personas or reset it back to the default via a menu or the keyboard. You can also automatically rotate through all of your themes on a time interval you select. Works for Firefox, Thunderbird, and Seamonkey.

Rated 5 out of 5 stars (49)
1,310 users
Updated July 11, 2017