User Guide

Capture a performance profile. Analyze it. Share it. Make the web faster.

Screenshot of profiler.firefox.com

Welcome to the user docs for profiler.firefox.com. This web app is the official Firefox Profiler for analyzing performance profiles of Firefox and the Gecko browser engine. Visit profiler.firefox.com, and follow the instructions to get started profiling. This guide has various documents and videos demonstrating how to get started profiling. Looking to contribute? Check out github.com/firefox-devtools/profiler.