Privacy and Security

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A Better S/MIME GUI Requires Restart

Provides a better S/MIME GUI for Thunderbird.

Rated 3 out of 5 stars (2)
4 users

Adblock Cyceam

Earn extra money while doing what you do everyday, browsing the web!

Not yet rated
3 users

Adblock Edge

Adblock Edge is a fork of the Adblock Plus version 2.1.2 extension for blocking advertisements on the web, without sponsored ads whitelist.

**This addon has been discontinued**

Rated 5 out of 5 stars (305)
406,460 users

Adblock Plus Featured

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (4,854)
20,683,219 users

AdNauseam

Fight back against advertising surveillance

Rated 4 out of 5 stars (6)
5,131 users

AlertSwitch Requires Restart

Turn on/off the alert shown when new message arrives.

Rated 4 out of 5 stars (3)
925 users

Allow HTML Temp Requires Restart

This Add-on allows to have HTML temporarily allowed in the currently displayed message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (if this is your default mode).

Rated 4 out of 5 stars (59)
11,921 users

Auto Address Cleaner Requires Restart

Removes comment, display name automatically from addresses before sending mail.

Rated 4 out of 5 stars (49)
15,561 users

Auto Password Registerer Requires Restart

Registers given passwords to Firefox/Thunderbird's password manager automatically.

Not yet rated
22 users

Automatic Export Requires Restart

exports by an intervall or after pressing the button selected calendars in a defined folder in two modes - normal and backup...

On my homepage is the current version.
Here on this site it takes a long time after i publish a new version.

Rated 4 out of 5 stars (45)
3,915 users

B-Trust Tool NEW

Configures B-Trust security devices, imports B-Trust certification chain.

Not yet rated
2,459 users

Batch Copy Requires Restart

Batch Copy creates a local copy of your IMAP account, copies all messages and maintains folder structure. Batch Copy can run incrementally to copy only new messages.

Rated 4 out of 5 stars (9)
1,290 users

Bitmask Thunderbird Extension Requires Restart

This extension includes:

* A wizard for creating Bitmask email accounts on Thunderbird.
* Cache prevention for Bitmask accounts.

Not yet rated
279 users

Blend In Requires Restart

Blends in OS-related values in User-Agent HTTP request header & a number of JS properties, so that Firefox (Thunderbird) appears to sites visited as running on the OS being used the most in the world. Thunderbird can also be blended in as Firefox.

Rated 4 out of 5 stars (10)
1,039 users

Bluhell Firewall

Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.

Rated 5 out of 5 stars (295)
113,013 users

BorderColors GT Requires Restart

How many time you sent an email from your wrong email address?
This add-ons allows you assign a different color to the compose window border for each of your email addresses. So you can immediately view from what account are you writing.

Rated 4 out of 5 stars (8)
4,358 users

Bork Bork Bork! Requires Restart

The Swedish Chef travesty filter and URL blocker. View web pages or mail as spoken by the Swedish Chef like this...

"Zee Svedeesh Cheff trefesty feelter und URL blucker. Feeoo veb peges oor meeel es spukee by zee Svedeesh Cheff leeke-a thees."

Rated 4 out of 5 stars (30)
121 users

CallingID Link Advisor Requires Restart

CallingID Link Advisor verifies the links you see in Firefox and Thunderbird are safe before you follow them. When the mouse is placed over any link a risk assessment and the full details of the site owner are displayed, helping you evaluate the...

Rated 2 out of 5 stars (10)
274 users

CapsKiller Requires Restart

Caps Killer is a protection against newbies using caps in their mails.

Rated 5 out of 5 stars (2)
81 users

Card Viewer Extended Requires Restart

Adds a button in address book cards to fetch and display the certificate of a contact.

Rated 5 out of 5 stars (1)
6 users