JavaScript Timeline in Chrome and Firefox?

I have a JavaScript issue where something doesn't work in Chrome but works in Firefox. Since this is part of a big Web Portal, I cannot easily isolate stuff.

I know that Chrome has a Javascript timeline, but does Firefox have something lik开发者_运维百科e that as well? Firebug only seems to set arbitrary breakpoints or "Break on Next", but no way to just see what JavaScript is executed.

Open firebug and click the arrow on the "net" tab. click enable. Lastly, reload the page.