E2E Testing In Protractor Using Firefox Or Safari?

I am using Protractor to test my angular.js app and its working great in Chrome. I had some issues getting it set up and learning the extra webdriver syntax for jasmine, but now I'm getting the hang of it and have a number of tests that are running and passing in Chrome.

Does anyone know of any way to run Protractor in Firefox or Safari or IE or Opera? I'd like to be able to run these tests against more browsers than just Chrome. I've looked through the Protractor docs on GitHub but it only shows config files for the chromeDriver. Is there such thing as a Firefox driver or a Safari driver?

PS. I don't think it'll be much help, so I'm not posting my current config file, but if it is useful, let me know and I can post it here.

Yes! You'll need to do a little setup depending on which browser driver you want to use, but firefox and safari should be trivial. Their drivers are included in the Selenium Standalone server. Just add

capabilities: {
    'browserName': 'firefox' // or 'safari'
},

to the config file.

For IE, you need to install a separate binary, and the Selenium Standalone Server needs that binary to be in your PATH. After that, you should be able to use ie as a browsername in your config. Check out the IEDriver documentation here - http://code.google.com/p/selenium/wiki/InternetExplorerDriver