Notifier for gmail, yahoo, hotmail, aol and more webmails.
X-notifier(aka WebMail Notifier) checks your webmail accounts and notifies the number of unread emails...
Supports : gmail, yahoo, hotmail, POP3/IMAP, facebook, twitter and more
Watch videos anywhere in cinema mode without leaving the website you're on.
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
Noia 4 -the successor of Noia 2 eXtreme- offers many skin types, easy Personas usage and many settings inside 'Noia 4 theme manager'.
Firefox 29+ Australis compatible beta versions
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
A very simple tabbed browsing extension that loads your homepage when you open a new tab. If you have multiple homepages, the first is chosen.
Screengrab! saves webpages as images.
New features: upload to internet
Allows the download manager to also open in a tab or sidebar, and adds some optional display changes.
YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
http://yslow.org is the official open source website.
Play all videos on youtube without flash in your preferred size using only HTML5.