I have been using FireFox for quite some time and and am very happy with it.
It has got some really nice features for developers like the Dom Inspector that helps you to visualize the HTML DOM.
It also comes with a lot of extensions.
If you like this browser, please help spread the word..
- Make live edits to the CSS of a web page..
- Validate the CSS, HTML and accessibility of a web page...
- Add a style sheet from your machine to a web page, etc..