performance - DOMContentLoaded In Fire Fox -

hopefully simple question answer, know domcontentloaded metric can found in fire fox. can find in chrome (in blue @ bottom) , ie (network > click website > timings tab). need separate extension?

i found answer while using fire fox extension, firebug. open net (network) tab, click html filter down page (optional), @ timeline section (column on right) , hover on ms. @ bottom of tooltip, you'll see domcontentloaded metric.