While Firebug focuses on JavaScript performance and provides detailed information about JavaScript function calls during the profiling session, the Performance Tool in the DevTools offers a broad spectrum of information regarding a website's performance but doesn't go into detail regarding JavaScript function calls. follow bellow steps to install firebugstep1: launch firefox browserstep2: go to search bar and type firebug and hit on enterstep3: click on first linkstep4. This is the part where Firebug and the DevTools differ the most, because the outputs are completely different. Thanks to Firebug, you will be able to edit HTML code and. it also provides information about HTML parsing or layout. FireBug is a really good add-on for Firefox that allows you to depurate the code of your webapps without having to close Firefox. The output of the Call Tree is the one that comes nearest to the output in Firebug, but the Performance panel provides much more information than just the JavaScript performance. A profile can be created via console.profile() and console.profileEnd() like in Firebug or via the "Start Recording Performance" button in the Performance Tool. This is a tutorial on how to install and use Firebug for Firefox web browser. The DevTools provide advanced tooling regarding performance profiling. Firebug allows to profile JavaScript performance via the "Profile" button within the Console panel or the console.profile() and console.profileEnd() commands.
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