Essential Firefox Addons for Calcalist readers More Info
Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!
Unique "speed dial" add-on for Firefox that gives you a fast way to to open your favorite sites using keyboard shortcuts. Ctrl + Space invokes the 'Launcher' then a single letter key press opens a specific site. E.g: open Facebook by Ctrl + Space, F
Launchy will enable you to open links and mailto's with external applications...