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Includes a powerful JavaScript debugger built in React and Redux, a Web Audio Editor to interact with audio nodes in real time, and a Network Monitor for identifying performance bottlenecks.

Chrome and remote debugging via USB or WiFi are enabled by default, facilitating easier mobile web testing. How to Download and Install download firefox web developer edition

Firefox is currently the only browser providing a visual tool specifically for building and designing with CSS Grid. Includes a powerful JavaScript debugger built in React

You can download the installer directly from the Official Firefox Developer Edition page. Firefox Developer Edition — Firefox.com download firefox web developer edition