Recently Updated Extensions


Add-ons button Requires Restart

Click to view your add-ons, you can adjust their preferences and more.

Not yet rated
2 users
Updated June 16, 2024

uBlock Origin

An efficient blocker. Easy on CPU and memory. New and updated filter list added.

Source code:

Rated 4 out of 5 stars (4)
46 users
Updated June 14, 2024

Manually sort folders for SeaMonkey Requires Restart

This extension allows you to manually sort (order) your folders in the folder pane of SeaMonkey Mail or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.

Not yet rated
19 users
Updated June 20, 2022

Metal Lion Image Saver Requires Restart

Single-click access to common actions for images (e.g. saving, copying, printing)

Not yet rated
10 users
Updated July 22, 2021

AMO Browsing for SeaMonkey

This extension makes browsing for extensions easier at It fixes incorrect information about some extensions being not available for SeaMonkey and adds links to the Add-on Converter where needed.

Rated 5 out of 5 stars (6)
110 users
Updated April 13, 2021

ExtExp Requires Restart

Export your extensions!

Not yet rated
4 users
Updated Feb. 27, 2021

Fierr Requires Restart

Replaces the error page with a more stylish appearance with additional features.

Rated 5 out of 5 stars (48)
5 users
Updated Feb. 27, 2021

About Add-ons Requires Restart

Adds an About button to extensions, themes, and languages in the Add-ons list.

Rated 4 out of 5 stars (12)
8 users
Updated Feb. 27, 2021

TimerFox Requires Restart

Easily counts down from a predefined number and alarms you when the count has reached zero.

Rated 4 out of 5 stars (21)
1 user
Updated Feb. 27, 2021

GaiaFormat Requires Restart

An enhanced text formatter for GaiaOnline Forums, Private Messages, Guilds, and Profile comments.

Rated 5 out of 5 stars (3)
1 user
Updated Feb. 26, 2021


window.crypto.signText replacement

Not yet rated
2 users
Updated Jan. 26, 2021

Mail Redirect Requires Restart

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

Rated 4 out of 5 stars (144)
2,702 users
Updated July 4, 2020

Session Manager

Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.

Rated 5 out of 5 stars (850)
153 users
Updated June 18, 2020

PDF Viewer for SeaMonkey

A fork of PDF.js with support for SeaMonkey 2.49.x.

Rated 5 out of 5 stars (4)
334 users
Updated June 9, 2020

Custom Sender Address and Reply Requires Restart

Select sender mail address based on the recipient and reply with the same address

Rated 5 out of 5 stars (2)
16 users
Updated Nov. 6, 2019

Flexible Identity Requires Restart

Selects an identity based on the recipients list when sending an email

Rated 4 out of 5 stars (39)
234 users
Updated Nov. 5, 2019

DownThemAll! Featured

The first and only download manager/accelerator built inside Firefox!

Rated 4 out of 5 stars (2,899)
250 users
Updated Nov. 5, 2019

Stay-Open Menu

Facilitates opening multiple items from the Bookmarks Menu and various other bookmark/history related dropdown menus.

Not yet rated
1 user
Updated Sept. 3, 2019

RequestPolicy Continued

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.

Rated 4 out of 5 stars (28)
6 users
Updated Aug. 18, 2019

Year view Requires Restart

Year view for calendar.

Rated 4 out of 5 stars (58)
70 users
Updated June 26, 2019