For the people that don't like the black bar. It can easily be reverted using the stylish addon. This addon is available for Firefox and Chrome and allows you to add custom styling to any website.

Made a Gist with the styling that will revert the black bar to it's original light grey header.

https://gist.github.com/babobski/41b29114a3c774bd018f75bd4ff...

And the Stylish addons can be found here: FF: https://addons.mozilla.org/en-US/firefox/addon/stylish/

Chrome: https://chrome.google.com/webstore/detail/stylish-custom-the...