Interface Customizations

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ImageTweak: zoom/rotate images and videos! Requires Restart

A no-clutter image viewer for Firefox that allows you to zoom, rotate and display images/videos against a custom background. ImageTweak is a must-have addon for any photographer or photography-loving user.

Rated 4 out of 5 stars (100)
135 weekly downloads

Restartless Restart

This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.

Rated 4 out of 5 stars (217)
128 weekly downloads

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 5 out of 5 stars (6)
126 weekly downloads

Re-Pagination

See more search results etc. on one page, concatenating several pages together...

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

All Menus Button

Show all the menus in a single menu button that can be placed anywhere. Also contains replacement buttons for the default menus.

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

Add-ons Manager - Version Number

Restores version numbers for all installed add-ons inside Add-on Manager on Firefox, Thunderbird and Seamonkey.

Rated 5 out of 5 stars (20)
126 weekly downloads

xSidebar Requires Restart Featured

Firefox style sidebars for SeaMonkey...

Rated 4 out of 5 stars (12)
119 weekly downloads

jQuery Requires Restart

jQuery and jQuery UI embedded in browser

Rated 4 out of 5 stars (7)
117 weekly downloads

Page Colors & Fonts Buttons

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 (6)
116 weekly downloads

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 (19)
115 weekly downloads

Telegram Web Messenger

Telegram Web Messenger brings Telegram right into your Firefox Sidebar.

Not yet rated
112 weekly downloads

Stylish Tools Requires Restart

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 (3)
108 weekly downloads

HTML5 Loop Requires Restart

Loop HTML5 Video and Music.

Rated 2 out of 5 stars (16)
101 weekly downloads

Responsible Blocker

The "Responsible Blocker" arrives to save the Internet, this extension blocks all those annoying ads, but allows only small and acceptable ads, so the websites you like can continue online.

The "Responsible Blocker" arrives to save the Internet

Rated 5 out of 5 stars (1)
99 weekly downloads

Safe for Amoled

Darkens the background of the page

Rated 3 out of 5 stars (21)
97 weekly downloads

True Full Screen in SeaMonkey

This extension enables true full screen mode in SeaMonkey for HTML5 video players, slide-shows, etc. and also for full screen invoked manually with the F11 key.

Rated 5 out of 5 stars (17)
93 weekly downloads

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)
90 weekly downloads

Old Default Image Style

Restores the default image style used for top-level images in previous versions of Firefox.

Rated 5 out of 5 stars (97)
86 weekly downloads

Edit Bookmark Plus Requires Restart

Resize 'Add Bookmark' Popup / 'Edit This Bookmark' Popup, fixes tree selection bug, option to disable popup auto close & Update Url and/or Name of a bookmark with the Url/Title of current page.

Replacement of OpenBook addon

Rated 4 out of 5 stars (71)
85 weekly downloads

SeaTab-X-2 Requires Restart

Adds Firefox-style tab closers into SeaMonkey.

Rated 5 out of 5 stars (21)
85 weekly downloads