In Firefox, I use Firebug which allows me to view every http request my ajax calls are making. I've switched over my development to Chrome and am liking it so far. My only complaint, however, is that the developer tools don't seem to allow you to view each ajax request. I've had it happen once where the Resources panel showed multiple requests to the same resource, but it's only done it once and never again.
Currently, to get around this, I'm running Fiddler next to Chrome to view my requests, but if there's a way to do it from within the browser, I'd prefer that.
I know this is an old thread but I thought I would chime in.
Chrome currently has a solution built in.
CTRL+SHIFT+I(or navigate to
Current Page Control > Developer > Developer Tools. In the newer versions of Chrome, click the Wrench icon > Tools > Developer Tools.) to enable the Developer Tools.
Networkbutton. If it isn't already, enable it for the session or always.