I like to use dark mode at night on Discourse forums, but I have not found a convenient way to get to the theme setting (under User_Preferences_Interface) without multiple steps, so I made this basic macro to get there in one step.
It works in all the forums I have tried as long as I am logged in and viewing the forum in the current Safari tab (since all the forums are .coms, my user name is the same across those forums and they all seem to use the same url structure).
This the first macro I've shared. Super simple, but may be of use to someone