Requestly development team use WebExtension APIs to build cross platform browser extension. This article is mainly intended for requestly development team to run the requestly source code on firefox.
Install web-ext npm module
npm install -g web-ext
Navigate to browser-extension source code and switch the mode to firefox
cd components/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.