Miscellaneous

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Lightbird Requires Restart

Standalone calendar UI for Lightning

Rated 4 out of 5 stars (18)
181 weekly downloads

Disable Addon Compatibility Checks (Version 4-56)

Reinstates the extensions.checkCompatibility preference.

Rated 5 out of 5 stars (4)
180 weekly downloads

TabSubmit

Lets the user direct the submission of a form to a new tab or window. [Bug #17754]

Rated 5 out of 5 stars (13)
169 weekly downloads

FiltaQuilla Requires Restart

Adds many new mail filter actions - launch a file, suppress notification, remove star or tag, mark replied or unread, copy as "read", append text to subject.

Rated 4 out of 5 stars (56)
161 weekly downloads

CardDAV Browser Requires Restart

A utility to browse vCards stored on a CardDAV server.

Rated 3 out of 5 stars (5)
136 weekly downloads

Highlighter Requires Restart

Quickly highlight some text in Thunderbird message composing windows.

Rated 4 out of 5 stars (49)
125 weekly downloads

Contact Photos Requires Restart

Displays contact photos in the message header.

Rated 4 out of 5 stars (25)
123 weekly downloads

Add-on Update Checker Requires Restart

Adds Tools menu item to check Add-ons for updates. Includes toolbar icon.

Rated 4 out of 5 stars (50)
116 weekly downloads

Copy As Plain Text Requires Restart

Removes formatting from copied text.

Rated 4 out of 5 stars (58)
106 weekly downloads

AutoPager Fixed Requires Restart

AutoPager Fixed is a working version of AutoPager extension for Firefox 36+ (non-E10s mode) to autoload the next page(s) when you scroll pages.

ATTENTION: DISABLE THE ORIGINAL AUTOPAGER ADDON!

Rated 3 out of 5 stars (52)
104 weekly downloads

about:config Button

Open about:config to change hidden settings that cannot be edited from the Options window. All Mozilla based programs have settings that can not be changed in the options window.

Rated 5 out of 5 stars (5)
98 weekly downloads

ScrapBook X AutoSave Requires Restart

Automatically saves web page to ScrapBook on browsing.

Rated 4 out of 5 stars (4)
92 weekly downloads

tzpush Requires Restart

Z-Sync to Thunderbird Addressbook
Will sync Thunderbird address book to Zentyal, Zarafa, Horde and outlook.com/hotmail.

Rated 4 out of 5 stars (16)
91 weekly downloads

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)
91 weekly downloads

Quote Colors Requires Restart

Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.

Rated 4 out of 5 stars (45)
87 weekly downloads

StopAll Ads

GO ADS FREE NOW!
Browse Safely. Optimize Surfing

Rated 5 out of 5 stars (8)
80 weekly downloads

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)
71 weekly downloads

Toggle Word Wrap Requires Restart

Toggle word wrapping and PRE element wrapping in the message composition and HTML display windows, respectively.

Rated 4 out of 5 stars (44)
67 weekly downloads

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)
67 weekly downloads

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)
63 weekly downloads