How to get a dashboard theme:
- You either have to use Firefox or Google Chrome in order for it to work.
- I use this to choose my theme.
- Click install as user scrip -> continue -> install.
- Go to tumblr and it should appear.
To un-install: If you’re using Google Chrome that is. Click on the wrench at the top right hand corner -> tools -> extensions & then disable the theme or uninstall it.