How to run backstop.js with Firefox on Ubuntu?

Question

How to run backstop.js with Firefox because in the official documentation for property engine I can set only chromy or puppeteer engine instance in the config file

 module.exports = options => ({ id: "zing-web", viewports: [ { label: "laptop", width: 1366, height: 920 } ], onBeforeScript: "puppet/onBefore.js", onReadyScript: "puppet/onReady.js", scenarios: options.scenarios, paths: options.paths, engine: "puppeteer", engineOptions: { args: ["--no-sandbox"] }, report: ["CI"], asyncCompareLimit: options.asyncScreens || 10, // Capturing screens in parallel asyncCaptureLimit: options.asyncScreens || 50, // Comparing screens in parallel debug: options.debug, debugWindow: options.debug })

Answer 1

As of today there is no official support for Firefox browsers with Backstopjs. However you can use it with Playwright engine that supports Chromium, Firefox and Webkit (Safari for MacOS).