- inline viewing of ajax requests
- go to link that works
- urls that work
- keyboard shortcuts for debugging (go to line, create breakpoint)
- inspector with more options
- easier to edit inline html with highlighting not raw text
- connecting to console via other extensions (chrome API is very small compared to firefox API)
- Better search in scripts
- Better search in DOM tree
- Better search in inspector
- Less clicking when viewing remote content
- Displaying remote content that works (file is loaded, content tab is empty)
Only a matter of time before it's implemented in chrome. But, firebug already has all this stuff and it makes a huge difference when debugging JS
Note: I wrote a couple of chrome extensions. Therefore, I cumulated more frustration than the average JS developer on chrome because switching to firebug is not even an option in my case ;-)