If you work on a website with some kind of Content Management System you probably spend a lot of time having to endlessly go to a site, go to the url bar, trim the url to the root domain, swear because you took too much, then type in /wp-content or /_cms.
This might make 10 seconds, but do it 20 times a day, 5 days a week for 251 working days, that's nearly 14 hours of your life in a year!
Just replace the ADMIN_URL with your admin path and hey presto! This will also strip off any extra url content after the domain so you don't even have to be on the homepage.Note: This won't work on some older IE versions due to the lack of support for 'window.location.origin'. But let's be honest, who the hell is developing websites on IE 9?