Want to customize your tumblr experience to the max? This tutorial will teach you how to replace the normal “tumblr.” logo with a cooler “tumblah.” logo.
(Firefox & Chrome only)
Your final result will look like so:

Go to this link http://userstyles.org/styles/46437/tumblr-tumblah-logo and click on install just Stylish (or “first install Stylish” with Google chrome).
Firefox:

Chrome:

In Firefox the Installation will be prevented unless you click on the allow button on the popup and then click “Install Now”
In Chrome you have to click the “Add” button.
Firefox (2 Steps):


Chrome:
(chrome)
Restart firefox, (if you are using chrome you don’t have to restart), and go to this link again http://userstyles.org/styles/46437/tumblr-tumblah-logo. Click on + Install with Stylish .
Firefox & Chrome:

You will see a “Style installed!” message. Navigate to your tumblr, refresh the page and your “Tumblah.” logo should be in place!
Happy Tumblring!