Interface Customizations

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Zorcher

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)
274 users

Password Mask Changer No Restart

Changes the mask character used in password fields.

Rated 5 out of 5 stars (4)
118 users

From/To Column

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

Rated 5 out of 5 stars (2)
192 users

Lightweight Themes Preview for SeaMonkey No Restart

Preview lightweight theme when hover on menuitems in Apply Theme menu.

Rated 1 out of 5 stars (1)
3 users

Page Navigation Buttons No Restart

Adds a few buttons to help with page navigation, including Page Top, Page Bottom, Page Down and Page Up.

Not yet rated
85 users

ToggleDocumentColors_

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 4 out of 5 stars (14)
477 users

Old Addon Manager

Brings back Firefox 3.x Addon Manager

Rated 5 out of 5 stars (1)
65 users

Page Colors & Fonts Buttons No Restart

Adds buttons to toggle the using the default page colors and fonts, and the page defined colors and fonts.

Rated 5 out of 5 stars (2)
353 users

Stylish Sync No Restart

Sync engine for Stylish with backup / restore facility.

Rated 5 out of 5 stars (19)
5,661 users

Stylish Tools

Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey

Rated 4 out of 5 stars (1)
1,084 users

Key config

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 (16)
2,942 users

Theme Font & Size Changer No Restart

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 (145)
86,210 users

lolifox - Fierr MOD

Replaces the error page with a lolifox appearance with additional features.

Rated 5 out of 5 stars (16)
4,211 users

Browser View

Open links, pages, and bookmarks in any other browser, using right-click context menus or with one click of the drop-down or standalone toolbar buttons. Modify any menu, browser name or location. Incognito/private browsing mode is also supported.

Rated 4 out of 5 stars (40)
1,694 users

IMAP Received Date

Make the “Received” column in IMAP folders show when messages were actually received.

Rated 5 out of 5 stars (6)
1,413 users

YouTube Anywhere Player No Restart

Watch videos anywhere in cinema mode without leaving the website you're on.

Rated 5 out of 5 stars (55)
30,046 users

KeePass Helper

Adds a hostname, URL, or email account ID to the application's window name (e.g., that of Firefox or Thunderbird) to make it recognizable to password manager utilities like KeePass.

Rated 4 out of 5 stars (34)
3,928 users

Classic Toolbar Buttons No Restart

'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.

Beta builds on versions page!

Rated 5 out of 5 stars (142)
39,280 users

Tab Wheel Scroll No Restart

Switch tabs by scrolling with the mouse wheel in the tab bar.

Rated 4 out of 5 stars (102)
10,814 users

URLFilter No Restart

Block advertisement and access to adult sites

Rated 4 out of 5 stars (13)
5,145 users