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.

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