GFork

as of 2022, the script doesn't seem to work anywhere anymore. sorry.
however, all the code for beatport.com, mixcloud.com, junodownload.com and soundcloud.com is still there if someone wants to update/fork or provide fixes for those services.
a copy of the original script can still be found here
http://userscripts-mirror.org/scripts/show/156420

note: this is obviously not my code. but as the original author is AWOL, here's an updated copy.

all I did was adding a couple fixes (soundcloud/beatport) made by users from this very site (check the link in the code) as well as two fixes by my humble self (discogs and bandcamp). I haven't even tested any of the other sites as I don't use them. if needed, hopefully someone else can :-)