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 easy way to download and convert Web videos from hundreds of YouTube-like sites.
Bypass compulsory web registration with the context menu via www.bugmenot.com.
BYM: Changes color combination ; left-click in the statusbar for changing its status (ON/OFF) or press Ctrl-Alt-B.
ER: Makes text reading easy; select the text, right-click, select the "Easy Read" entry in the context menu or press Ctrl-Alt-Z
Automatically highlight and count all occurrences of the selected text with just a click (substitute for Ctrl-F with highlight option). Another click in the document removes highlighting.
Persistent and private sticky notes for Firefox.
Textmarker! is a text higlighter and text copying tool for Firefox. It allows you to highlight text selections via keyboard and context menu and then highlighted text to be copied. 3 highlighter colors can be configured.