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).
The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.
Collector's Note Better than its name.
Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.
— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!
Collector's Note MAFF is more compact than a messy _files directory. MHTML is sometimes practical for emailing a site later. Only it should default to JPG etc when saving single files!
Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.
Collector's Note Sometimes enforcing https is better than just using http, but beware, https can help the server keep track of who you are (TLS session id can be abused like a cookie)
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
Collector's Note Download pop-ups hurt.
Your browser trusts many certification authorities and intermediate sub-authorities quietly, every time you enter an HTTPS web site. This add-on reveals when certificates are updated, so you can ensure it was a legitimate change.
Collector's Note Be in control.
Connect securely to https websites by checking certificates with network notaries. See http://www.perspectives-project.org
Collector's Note Be even more in control.
Prevent FaceBook(tm) to known the websites you visits.
Collector's Note If it doesn't work, there's also a trick to make NoScript do this.. but it's more complicated.
Auto complete Firefox3 SSL certificate exception override on exceptionDialog.
RCE extension is a robot which can auto-click buttons on netError:badcert page: 'Add Exception', 'Get Certificate' and 'Confirm Security Exception'.