Well In my Laptop Google Chrome is the default browser because of its browsing speed but when it comes to add ons Its only Firefox all the way….

Here I am giving you some of my favorite and useful add ons:-

Meebo:I am a big big fan of meebo to chat with my gtalk,msn,yahoo messenger friends and I got this meebo addon which gives me notifications and also a sidebar of buddy list(which also you can hide) in my browser.
Get meebo addon

Strata40:This addone gives your browser the look of upcoming firefox 4

Get Strata40

Xmarks: This add will make a backup of your all bookmarks in their server so that you can retrieve those-like after a formatting your C drive.
Get Foxmarks
Foxtab: A add on to organize your tabs in Firefox with different types of interface.
Get FoxTab

Wisestamp: This add on is for spicing up your email signature-providing the url to your social sites,blogs also contacts,IMs etc.

My mail signature which i have created using WiseStamp

My mail signature which i have created using WiseStamp

Get Wisestamp

Power Twitter: This addon is for Twtitter.May be so many tweeps are using it but I am putting it for those who don’t know it.I have attached some self explanatory screen shots which will explain the features of this add to you.

Power Twitter

Showing new tweets alerts,Link details,RT button,Options in status bar

power twitter

You can twitpic from your status bar

power twitter

Showing Users last tweets and also the twitpic in the the same page

Get Power Twitter

AutoCopy: very useful add on for blogger and web developers.If it is enabled then when you  select text it’s automatically copied.
Get AutoCopy

I will be adding to this list.