How to set up requestly on Firefox using WebExtensionAPI

Sagar Soni

April 2, 2026

Learn how to develop and run Requestly on Firefox with this comprehensive guide using Webextensions API Firefox. Step-by-step instructions for development

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Introduction

The Requestly development team utilizes WebExtension APIs to construct a cross-platform browser extension. This guide is specifically designed to assist the Requestly development team in running the source code of Requestly on Firefox using Webextensions API Firefox, ensuring a seamless development experience.

Steps

Install web-ext npm module
‍

				
					 npm install -g web-ext

Navigate to browser-extension source code and switch the mode to firefox

				
					 cd browser-extension

				
					grunt select-firefox

Open a new terminal to run firefox with extension installed

				
					cd dist
web-ext run
Use web-ext –help // to get the list of available commands

Written by

Sagar Soni

Sagar is the co-founder and CTO of Requestly (recently acquired by BrowserStack). With over 8 years of experience in software development and entrepreneurship, he’s passionate about building innovative tools that solve real-world problems. From architecting scalable web applications to leading cross-functional teams, Sagar has worn many hats throughout his journey from technical implementation to business strategy. Always looking for the next challenge to tackle.

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