RikuP's Comments

Actually, meant that if you keep the grindquest tab minimized, in a separate window and your other tabs are minimized too, it should work. Earlier comment was total cat brainfart. My apogologies.

You can keep it going on while inactive if the tab is in separate window, and is restored down.

@exterminator1278, from the achievements tab you can see how many hours you've played. ^_^