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Step 1: Google “stylish” to look for a Firefox or Chrome add on, install Stylish.
Step 2: Click here to add the corgi button to your dash: http://userstyles.org/styles/72817/corgi-tumblr-dashboard-button
Step 3: Close out Chrome or Firefox, restart it, open up tumblr and go “dawwww”
Thanks MadameBooBoo for showing me how!