1. Firebug : Firebug needs no introduction, with Firebug you can do lot of stuff like editing a web page and monitoring the page Firebug is the best friend for web developers.
Install firebug on Chrome go here.
Install firebug on Firefox go here.
2. Web Developer : With Web developer plugin you got bucket of options to develop/edit a web page, Web developer is developer by Chris Pedrick.
Install firebug on Chrome go here.
Install firebug on Firefox go here.
3. Alexa : If you are an SEO then Alexa helps you lot, alexa provides the Website rank.
Install firebug on Chrome go here.
Install firebug on Firefox go here.
4. Cookie Manager : With cookie manager you able to edit cookies on the web page, you can also hack some web pages.
Install firebug on Chrome go here.
Install firebug on Firefox go here.
