Mozilla Firefox is distributed as very light web browser without any special functions. However through Add-Ons Manager, users can customize their Firefox with extra functionality or style.
Firefox official Add-Ons archive is available via Add-Ons Manager (Ctrl+Shift+A) or Mozilla.org website in section Add-Ons.
Firefox add-ons are clearly divided to specific categories. Below is a list of the most popular and useful add-ons for every day use sorted by few categories.
Featured Firefox Add-Ons
Personas Plus gives more control and easier access to new, popular and user's favorite Personas. Personas are simple skins for Firefox.
FireGestures enables mouse, wheel and key gestures in Firefox.
Custom Buttons gives users possibility to create their own toolbar buttons.
DownloadHelper is a tool used to download videos and images from Youtube and other similar video web sites.
DownThemAll is download manger that is able to increase download speed and allows you to pause and resume downloads at any time.
FireFTP is a secure FTP/SFTP client for Mozilla Firefox. FireFTP includes many advanced features, such as directory comparison, SFTP, SSL encryption, integrity checks, file hashing etc.
Feeds, News & Blogging
Forecastfox Weather is useful add-on that displays international weather forecasts in a toolbar or a status bar.
Gmail Manager allows user to receive new mail notifications, along with viewing account details including unread messages, saved drafts, spam messages, labels with new mail etc.
Brief is easy-to-use RSS reader. RSS feeds are presented on a seamless, interactive page.
Security & Privacy
Adblock Plus is very powerful add-on used to remove adverts, banners and stop tracking from websites. It is also able to block all known malware domains.
LastPass Password Manager
LastPass is free password manager and Form Filler that encodes all sensitive data and stores them on own Internet server.
Web of Trust (WOT)
Web of Trust shows users, which websites are potentially malicious based on millions of users' experiences.
IE Tab embeds Internet Explorer Trident web layout engine in Firefox. User can switch by one simple click between Trident and Gecko engine.
HTML Validator is extension that adds HTML validation inside Firefox.