Miscellaneous

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Direct Currency Converter for SeaMonkey

Converts prices from any currency ($, £, etc.) to prices in a selectable currency automatically while browsing.

Not yet rated
18 users
Updated April 15, 2017

Contact Photos Requires Restart

Displays contact photos in the message header.

Rated 4 out of 5 stars (25)
2,299 users
Updated April 15, 2017

gContactSync Requires Restart

Synchronizes contacts & groups between Thunderbird or SeaMonkey and Google Contacts. Imports Facebook friends, contacts you follow on Twitter, and more.

Rated 4 out of 5 stars (226)
85,573 users
Updated April 14, 2017

MyAdFilter

With MyAdFilter, free content creators propose you only one ad. Apart from those, as your usual ad-blocker, MyAdFilter disables all ads.

Not yet rated
48 users
Updated March 30, 2017

The Adblocker Project

A powerful ad blocker that blocks ALL ads but ads from publishers who shares revenues with targets YOU choose.

Rated 5 out of 5 stars (3)
248 users
Updated March 17, 2017

OverbiteFF Requires Restart

Add legacy protocol support back to Firefox and SeaMonkey with OverbiteFF, which restores support for Gopher servers, plus CSO/ph searches, finger, whois and more! Cross-platform JavaScript runs anywhere Firefox does.

Rated 5 out of 5 stars (22)
2,308 users
Updated March 14, 2017

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 (680)
235,793 users
Updated Jan. 30, 2017

SmartTemplate4 Requires Restart

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 (51)
15,810 users
Updated Jan. 23, 2017

Extension List Dumper 2 Requires Restart

This extension adds a button ("Dump list") to the Add-ons window. When this button is pressed, a new window is opened with the list of installed extensions, themes or plugins...

Rated 4 out of 5 stars (35)
1,703 users
Updated Jan. 15, 2017

eBay Template Generator Compatible with Firefox 57+

Generate e-bay templates online - in few minutes.

Rated 5 out of 5 stars (3)
47 users
Updated Jan. 11, 2017

EDS Calendar Integration Requires Restart

Integrates calendars events with Gnome clock applet

IMPORTANT:
Plugin may hang on Fedora.
As a workaround uninstall evolution-ews.

Rated 4 out of 5 stars (10)
484 users
Updated Dec. 15, 2016

BBCodeXtra Requires Restart

(Sorry, no plans to port this add-on to Webextensions)
BBCodeXtra is an extension, compatible with Mozilla FireFox (up to 57) and Seamonkey, which adds to the context menu new commands to insert BBCode/Html/XHtml codes in an easy and fast way...

Rated 5 out of 5 stars (64)
2,690 users
Updated Nov. 27, 2016

ChatZilla Requires Restart

A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.

Rated 4 out of 5 stars (138)
69,956 users
Updated Nov. 9, 2016

XDM Hook for Linux & Mac OS X Requires Restart

XDM integration module for Firefox on Linux and Mac

Rated 5 out of 5 stars (2)
372 users
Updated Sept. 30, 2016

Extension Auto-Installer

Extension Auto-Installer is a helper for Firefox/SeaMonkey/Thunderbird extension developers: it allows automatically adding or updating browser extensions, e.g. via command line tools. This makes testing your changes easier.

Rated 5 out of 5 stars (49)
1,815 users
Updated Sept. 15, 2016

Copy Plain Text 2 Requires Restart

Copies text without formatting

Rated 5 out of 5 stars (90)
28,110 users
Updated Aug. 21, 2016

Disable Addon Compatibility Checks (Version 4-56)

Reinstates the extensions.checkCompatibility preference.

Rated 5 out of 5 stars (4)
2,286 users
Updated Aug. 18, 2016

Addons Quick Search Requires Restart

Type first letters of add-on name to find them in the list or press Ctrl+↑/↓ to switch between add-ons categories.
Additionally remember and restore last selected item in each list.

Rated 5 out of 5 stars (11)
503 users
Updated Aug. 3, 2016

Addons Manager Hilite

Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Version 3.0 also includes sorting buttons. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.

Rated 5 out of 5 stars (18)
442 users
Updated July 23, 2016

Scrapbook X CopyPageInfo Requires Restart

Copies the information from ScrapBook data items.

Rated 5 out of 5 stars (1)
483 users
Updated July 20, 2016