Add-ons
Most Popular See all »
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Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey101,750 users -
An easier management of the user interface language27,432 users -
Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.23,104 users -
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.13,579 users
Top Rated See all »
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Makes search results sort by "date" instead of "relevance" by default.3,009 users -
A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.2,125 users -
Hide title bar if window is maximized.
This add-on has been discontinued!
Legacy extensions support will be dropped in Firefox 57. If you interest in CSD on Linux, please track progress on https://bugzilla.mozilla.org/show_bug.cgi?id=1283299.2,198 users -
This add-on offers ui tweaks to improve Thunderbirds appearance (squared tabs, custom tab height, alternative Add-on Manager appearance, compact main toolbars and more).1,434 users -
Restores version numbers for all installed add-ons inside Add-on Manager on Firefox, Thunderbird and Seamonkey.1,429 users -
The Add-ons Manager slims down!
This add-on reduces the height of entries in the Add-on Manager, so you can display more of them at a time.3,452 users
Recently Added See all »
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⦁ NEW! Floating Toolbars & Menus with autohide!
⦁ "Maximize your screen content space by adjusting window TitleBar, Tabs, Toolbars, etc!".
⦁ Multiple Configurable Actions for both screen-corner buttons: Application/'Home' & Close buttons!0 users -
Sets the urgent flag (X11) of the Thunderbird window under Linux in case of new messages. Does ignore special folders like Drafts, Junk and such.0 users
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Make some text notable on the each folder in folder's property dialog box.0 users -
Fixed version (no 90 day timer till silent failure) of the popular "Theme Font & Size Changer for Thunderbird" addon5,873 users
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Provides a special button to send mail to internals. "Internals" may be company, organization, or user group and so on.24 users
See all 130 extensions in Appearance and Customization »
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