Use PDF Download to do whatever you like with PDF files on the Web. Regain control and eliminate browser problems, view PDFs directly in Firefox as HTML, and use the all-new Web-to-PDF toolbar to save and share Web pages as high-quality PDF files.
Seoquake is a Firefox SEO extension aimed primarily at helping web masters who deal with search engine optimization (SEO), social media optimization (SMO) and internet promotion. Seoquake allows to investigate many important SEO parameters.
StumbleUpon is the easiest way to discover new and interesting photos, videos, web pages and more, recommended by a community of experts. Tell us what you are interested in and we recommend page after page of amazing stuff you’d never expect to see.
Russian spellchecking dictionary
AutoPager automatically loads next pages when you reach the end of a page. It works on a ton of sites,Google,Yahoo..
It works well with most other add-ons adblock plus, WOT and most of the greasemonkey scripts.
You can also try AutoPagerLite.
Recently called "THE Parental Control for Firefox"! FoxFilter is a personal content filter that helps block pornographic and other inappropriate content. All filtering features are free! Premium features available with small support fee.
URL Link is a small Firefox and Thunderbird extension that allows you to select a non-URL in a mail/news message or web-page, and open it in a browser window.
A Statusbar with speed, percentage, time and loaded size (similar to Opera's one)
View and manage downloads from a tidy statusbar - without the download window getting in the way of your web browsing.
Thanks Tekzilla for your awesome review! Click here to see their video: http://youtu.be/BUDqWrJ-Vao
Combined with the ChromeToPhone application for Android, this extension allows to send urls, text and files from Firefox to your phone or tablet.
Collector's Note link -> Android
Ever wanted to know what was behind the link before you clicked? Interclue tells you everything you need to know before you open yet another tab.
Collections are groups of related add-ons that anyone can create and share.Explore Collections