I use a plugin called no-script in firefox - is there any news on when it will be available for Chrome? I will hang on to firefox until I can decide what js to burn my cpu cycles on, thank you.
Another thing to think about, is that one of the biggest selling point with Chrome is it's ability of render scripts faster. If you are going to use an extension like noscript, whats the point of using Chrome? Might as well stick with Firefox.
The built-in developer tools are WebKit's, which have been far better than Firebug for about the last year now.