[trevinhofmann]

I used pixelmatch + puppeteer at a previous job to automate this. The service would screenshot each page on the master branch and the PR branch, then comment on the PR with a link showing the Before, Diff, and After of each page that changed. I highly recommend this type of setup.

[lloydatkinson]

Where did you upload the screenshots?

[trevinhofmann]

The same service kept the screenshots in its file system, and served them along with with the web pages that displayed them.

[simonw]

I love that idea.