NoScriptallows JavaScript, Java and other executable content only for trusted domains of your choice, e.g. your home-banking web site.
McAfee SiteadvisorSiteAdvisor is a downloadable tool that works with Firefox to help you:
Stay safe while you browse, stay safe while you search, and click to see a site's report page.
ReminderFoxan extension for Firefox and Thunderbird that displays and manages lists of date-based reminders and ToDo's. ReminderFox does not seek to be a full-fledged calendar system. In fact, the target audience is anybody that simply wants to remember important dates (birthdays, anniversaries, etc) without having to run a fat calendar application.
Tab To WindowOpen an existing tab in a new window, or join a tab to an existing window.
Tabs Open Relative makes all new tabs open to the right of the current tab, rather than at the far right of the tab bar.
UnPlugThis extension which lets you save video and audio which is embedded on a webpage - it's a video download tool.
It scans web pages and tells you where media players are getting their data from, and displays it as a simple hyperlink: in most cases, you can then follow the simple download link to save the media file.
Email This! Bookmarklet ExtensionEmail This! (formerly known as GMail This!) will send your recipient the link, title, & highlighted text of the page you are viewing using GMail, Yahoo, and Stand-Alone Mail Clients like Outlook Express, Thunderbird, & More!
CoLTadds two menu items to the browser's context menu, both of which are only visible when right-clicking a hyperlink. The "Copy Link Text" menu item copies a hyperlink's associated text to the clipboard, while the "Copy Link Text and Location" menu item copies both the hyperlink's text and URL to the clipboard in the format you choose: either as plain text, as an HTML hyperlink, or as a custom format (which you may specify), such as BBCode.