Interface Customizations

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Theme Font & Size Changer for TB

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.

Rated 5 out of 5 stars (1)
1,658 users

Right Links Requires Restart

This extension allows to open links in new tabs with right-click directly and using “long” left-click.
This is very useful for touchpads on notebooks and for mice without middle button.

Rated 5 out of 5 stars (143)
6,569 users

Key config Requires Restart

This add-on provides configurable keyboard shortcuts for several actions and a dialog to customize them.
All shortcuts can be redefined in Tools -> Key settings

Rated 3 out of 5 stars (20)
2,077 users

Active Stop Button Requires Restart

Stop gif animation with button, context menu or Esc key

Rated 4 out of 5 stars (41)
3,030 users

Dorando keyconfig Requires Restart

A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)

As of version 2016.2, Custom keys (using custom JavaScript) work again!

Rated 5 out of 5 stars (35)
9,330 users

Remember Mismatched Domains Requires Restart

The Remember Mismatched Domains extension for Firefox and Thunderbird adds a "Don't warn me again about this certificate for this domain" checkbox to the Domain Mismatch and Expired Certificate warning windows. When selected the domain...

Rated 5 out of 5 stars (66)
132 users

Zorcher Requires Restart

Selecting a small text on the page do not need to copy it into the search bar of your browser or search engine. Just press the right mouse button and select the search service from the available list.

Rated 5 out of 5 stars (10)
107 users

WebPG for Mozilla Requires Restart

An extension which provides GnuPG/GPG/PGP related functions to Moizilla Firefox, Thunderbird and Seamonkey

Rated 3 out of 5 stars (24)
861 users

Search Engine Quick Switcher

Switch the current search engine on the fly! Press Control + Shift + Down Arrow to switch to the next search engine or Control + Shift + Up Arrow to select the previous one.

Rated 3 out of 5 stars (2)
9 users

Fragment Titles

Save better history for fragment URLs.

Rated 5 out of 5 stars (3)
12 users

ToggleDocumentColors_ Requires Restart

Adds a toolbar button and keyboard shortcut to switch between the default page colors and user-defined colors.
Firefox shortcut: Control-Shift-C
SeaMonkey shortcut: Control-K

Rated 5 out of 5 stars (15)
361 users

Password Mask Changer

Changes the mask character used in password fields.

Rated 5 out of 5 stars (4)
34 users

From/To Column Requires Restart

Add a “From/To” column which shows the recipient if you are the sender.

Rated 5 out of 5 stars (2)
122 users

Dybutar

Dynamic creation of bookmark-style toolbar buttons which you can customize.

Rated 5 out of 5 stars (12)
57 users

Zing! Locale Switcher

Want to change from one language to another? Zing! and the locale is switched.

Rated 5 out of 5 stars (2)
225 users

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 5 out of 5 stars (8)
875 users

Show History Popup

When you press the middle mouse button or scroll wheel mouse show popup window the history in the url bar and search bar.

Rated 4 out of 5 stars (2)
32 users

Shift+LeftClick XUL Requires Restart

This simple addon has only this functionality, nothing else: it opens links in a new active tab with Shift+LeftClick (left mouse button click).
Better use https://addons.mozilla.org/ru/firefox/addon/shiftleftclick-opens-links-in-/ for FireFox.

Not yet rated
5 users

GNOMErunner Options Requires Restart

Allows to customize GNOMErunner theme

Not yet rated
880 users

xSidebar Requires Restart Featured

Firefox style sidebars for SeaMonkey...

Rated 4 out of 5 stars (12)
26 users