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Duplicate Tab Blocker
Prevent duplicate tabs. Allow only one tab for a url. If you click a link that is already opened in a tab, then existing tab would be focused instead of opening a new tab. This works even across firefox windows.
AutoSave Plus for ScrapBook Plus / XSidebar
Requires Restart
AutoSave is an Add-On to the firefox extension ScrapBook Plus by haselnuss and ScrapBook with XSidebar for SeaMonkey. This is a modified version of the original Add-On. Uninstall the original AutoSave before you use this extension.
ScrapBook AutoSave Improved
Requires Restart
ScrapBook AutoSave Addon, with some extra features.
Share to Google+ Page
Requires Restart
Share to your Google+ Profile or Google+ Page with just click of a button.
ArsTechnica Single Page Article
Shows a single page containing the whole multi page article.
Búsqueda en la barra de direcciones en Twitter
Mozilla Firefox con Twitter te conecta instantáneamente con lo que está sucediendo en el mundo.
Busca personas y temas en Twitter usando @ y # desde la barra de direcciones.
Словарь синонимовъ RU
Requires Restart
Adds to browser Russian(RU) synonyms dictionary from package LibreOffice.
To create your own collections, you must have a Mozilla Add-ons account.