Great post on Res Ipsa Blog:  Become an Efficient Researcher: Top Twenty Firefox Add-ons that Make Firefox the Researcher’s Browser of Choice:

Firefox was introduced in 2004 as a free open-source replacement for Microsoft’s Internet Explorer. Firefox offered improved security and introduced tabbed browsing, an integrated spell checker, and a download manager. Today, Firefox is the second-most popular browser, with almost twenty percent of the browser market share. The popularity of Firefox continues to grow primarily because of its speed, ease of use, and the availability of free “add-ons” which allow users to add additional features to customize the Firefox browser.

As the amount of scholarly material available on the web increases, so to does the need to an efficient means to find, sort, organize and cite the material. Below are twenty of the best tools available on Firefox that researchers can choose from to build a customized, highly efficient research tool.