Top Firefox Extensions
Live HTTP headers – tinyurl.com/yvmhkf
This extension shows you the raw HTTP headers that a webserver returns. It’s very handy for debugging issues with 404s, redirect, monitoring cookies and so on.
Greasemonkey – tinyurl.com/ynvmda
Greasemonkey is a useful tool that lets you write scripts to modify different websites. It enables you to change the way a website displays and install different scripts to customise HTML pages.
RefreshBlocker – tinyurl.com/2wz2k2
This extension will prevent your browser from following the forwarding specified by the refresh parameter of the META tag element. It can also be handy for debugging.
ShowIP – tinyurl.com/3xj8r5
Show you the IP address of a website and allow you to copy it to the clipboard. It also allows querying custom services by IP (right mouse button) and Hostname (left mouse button), like whois, netcraft. Additionally you can copy the IP address to the clipboard.
PrefBar – http://prefbar.mozdev.org
This allows you to change your user agent. Change it to Googlebot to see exactly how a webserver responds to the Googlebot user agent, or try importing new buttons for extra features.
Google Browser Sync – www.google.com/tools/firefox/browsersync
A great feature that continuously synchronizes your browser settings – including bookmarks, history, persistent cookies, and saved passwords – across your computers. It also allows you to restore open tabs and windows across different machines and browser sessions.
Popularity: 10% [?]