I just updated my Firefox to 60.0, and am using TamperMonkey. It’s working fine here
Ultimate Timeline won’t appear on the Dashboard until the web page is fully loaded. Right now where I am located, Wanikani seems to be loading very slowly. Try confirming whether the page really seems to be finished load (maybe by looking at the icon on the browser tab?)
Finally, though I doubt it will make a difference, could you try moving Open Framework to run in the #1 spot?