traceGL is referred to as a trace debugger. The sort of debugger that you have supplied within a typical browser is a breakpoint debugger. You set breakpoints and the code runs until it hits the breakpoint where you can examine variables and find out if the actual state matches your predicted state. You can generally single step from a breakpoint to discover what happens next, but generally you go from one breakpoint to another.
Take a look at the video demo to see if you think that this approach to debugging is for you:
traceGL costs $14.99 and you can buy it using Bitcoin or credit card.