> Some browsers, including Chrome but not Firefox, have the ability to check the amount of Javascript memory used. So the solution to test if an object is there

> Some browsers, including Chrome but not Firefox, have the ability to check the amount of Javascript memory used. So the solution to test if an object is there, is to make it sufficiently large so that it has a noticeable impact on memory. It's not observable from content, but the Firefox profiler is awesome. Check out https://profiler.firefox.com/docs/#/./memory-allocations https://profiler.firefox.com/docs/#/./memory-allocations