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

Question

I\'d like to collect the best debugging aids for all browsers out there. So that would probably be Firebug for Firefox but what do you use for IE? Safari? Opera? Opera Mini?

Answer 1

1. IETester for IE-versions.
2. Adobe BrowserLab or SuperPreview extension for IE for testing designs in multiple browsers.
3. Developer Toolbar for IE.
4. And ofc Firebug for FIrefox.