Add-ons

This is a list of libre extensions, themes and translations for the browser. It is a work in progress, we need volunteers to add content to the list. If you want to help, please ask in the forums/mailing lists.
Name Description Screenshots Tags
Selfoss Notify Checks and shows unread items count in your Selfoss RSS reader (http://selfoss.aditu.de). Aslo provide simple interface to interact with Selfoss. Add reader URL in settings, you must be authenticated... jetpack, notify, restartless, RSS, selfoss
SenSEO Analyzes web pages and tells you how good they fulfill on-page Search Engine Optimization criteria. SenSEO is integrated with the popular Firebug web development tool. The code is based on the YSlow... Development, firebug, SEO
Serbian dictionary Dictionary, serbian, spell-check, spell-checker, spell-checking, Српски
Server Spy Allows the user to see what server software the website is running. (Apache, nginx, Microsoft IIS, etc. Server, server brand, server software, server spy, serverspy
Session box - Tabs manager Save, organize, and synchronize your browser Tabs and Opened Windows. With Session Box features: - Auto Sync added, every 5 minutes! - Sync between Chrome and Firefox ★★ Protect your Saved tabs with... jetpack, save session, save tabs, session manager, sync tabs, tabs manager
Session Manager Saves browsing sessions between crashes and closes. Sessions
ShareMeNot ShareMeNot is a Firefox add-on designed to prevent third-party buttons (such as the Facebook “Like” button or the Twitter “tweet” button) embedded by sites across the Internet from tracking you until... block, blocking, facebook, share, sharemenot
Show Password If you are not worried about someone looking over your shoulder and seeing your passwords, then you can use this add-on to show the password so you can make sure you typed it correctly. password
Showcase Allows you to manage and preview tabs. Tabs
ShowIP Displays your IP Address in your taskbar IP Address
Sidebar Bookmarks Search Plus Creates a bookmark sidebar Bookmarks
Simple Lorem Ipsum Generator Generates a Lorem Ipsum Text and copies it to clipboard. You can also use ctrl+y as global hotkey. ipsum, lorem, lorem ipsum
Simple Timer Adds a simple timer/clock to the status bar. Clock, simpletimer, Time, Timer
SimplyRead SimplyRead is a simple program to remove unwanted distractions from webpages, in order to better enjoy reading on the web. It removes everything but the article from a webpage, displaying it simply... minimalistic, simple
Single Key Tab Switch Allows for the creation of hotkeys for the navigation between tabs. Tabs
Sir.Community This theme was made for the Sir.Community. community, sir, sunnysir
SKY plus! An extended version of the SKY theme that adds a background image to the toolbar. light blue, sky
Slickerfox Slicker, simpler, simpler, flatter, fuller, foxier theme. To revert the browser to its default tab closer behavior, add this line to your userchrome.css: .tabbrowser-tabs[overflow="true"] .tabbrowser... flat, plain, simple
Slovak dictionary slovak, spell-check, spell-checker, spell-checking
Slovenian dictionary Dictionary, slovenian, slovensko, spell-check, spell-checker, spell-checking
Smart HTTPS Automatically changes HTTP addresses to the secure HTTPS, and if loading encounters error, reverts it back to HTTP. Note: HTTPS Everywhere do not have fallback. HTTPS, ssl
Smart Referer Send referers only when staying on the same domain. The check for domain changing is made with the same origin policy. If you disable strict mode it will treat subdomains as same domain. privacy, Referer
SmoothWheel Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled). Why? - Faster navigation within long web pages (dynamic scroll distance). - Less disorientation when... Scrolling
Snooze Tabs Snooze Tabs help you focus your attention online, whether you want to remove distractions for now or save something for later. Hit the snooze icon to dismiss tabs you don’t want now, and set an alarm... Bookmarks, Tabs
Snowflake Pluggable Transport using WebRTC. Snowflake is a system that allows people from all over the world to access censored websites and applications. Similar to how VPNs assist users in getting around... anonymity, privacy, Tor