One upcoming feature that I'm very excited for is Workspaces in Chrome dev tools: https://plus.google.com/+GoogleChromeDevelopers/posts/644qQuBKZeL https://plus

One upcoming feature that I'm very excited for is Workspaces in Chrome dev tools: https://plus.google.com/+GoogleChromeDevelopers/posts/644qQuBKZeL https://plus.google.com/+GoogleChromeDevelopers/posts/644qQu... It will allow developers to set local folders as first-class source folders so that they can be navigated and modified just like normal sources pulled over the network, with the added benefit that you can also save your changes back to the files. This still doesn't make it as suitable for development as, say, Sublime Text, but it's a big step in that direction. Now if only you could script it, we'd be golden! As far as extensions go, the only one I use on Chrome is Advanced Rest Client, and it works very well for what it does: https://chrome.google.com/webstore/detail/advanced-rest-client/hgmloofddffdnphfgcellkdfbfbjeloo https://chrome.google.com/webstore/detail/advanced-rest-clie... On Firefox, Firebug is still invaluable, don't work without it: http://getfirebug.com/ http://getfirebug.com/