[peder541]

Unfortunately, you really do need to test on all the browsers. That being said, you can have a main browser you develop in and once you finish certain features, do quick tests to see if the other browsers behave the same.

I use Firefox as my main development browser because it doesn't cache files saved on the local disk. Chrome does cache locally saved files, so you need to remember to the clear the cache (Ctrl + F5) after making any changes to your code. This is surprisingly easy to forget and can lead to some frustrating moments.

I do prefer Chrome's built-in console, so I'll often switch to Chrome if I'm going to use the console a lot.

Finally, Opera has a sweet Remote Debugger that's nice for doing client side development for mobile devices.