Applitools Eyes Express

Automated visual testing is the easiest and fastest way to test any webpage exactly as it appears to the end user.
Applitools Eyes Express takes this a step further: instantly test your web-site or application for visual regressions & functional bugs - without writing any test code.
Applitools Eyes Express captures screenshots of individual webpages or entire web-sites, uses sophisticated image processing algorithms to identify UI & functional bugs, and determines if the screenshots have changed from release to release.
Perfect for Frontend Developers & Manual Testers, who want to instantly validate their app’s UI without writing test code.
Install the extension, navigate to the URL of your choice, and run a visual test with a click of a button. Test results will be displayed in a new browser tab under your Applitools account (sign up for a Free account: .https://applitools.com/sign-up/)
A quick start tutorial for using the extension:
https://eyes.applitools.com/app/express.html

This extension requires general read / write access permission to all open browser tabs, in order to capture screenshots and resize tabs.
The Applitools Eyes Express Chrome extension source code can be found at https://github.com/applitools/eyes.extension