Which tools do you use to debug HTML/JS in your browser?

Solution 1:

For Firefox (any version > 2.0), use Firebug.

Solution 2:

Here is a roundup

  • Firefox has Firebug and Webdeveloper Toolbar,
  • Safari and Chrome has the Inspector,
  • Opera has Dragonfly,
  • Internet Explorer has the Developer Toolbar

Firebug still has the most advanced features, but the others are catching up.