While I'm preparing documentation and article you already can use the extension. You can download it from https://github.com/gonzazoid/Pomogator unpack and install unpacked or just visit this page https://gonzazoid.com/posts/2024-05-15-pomogator-installation.html (it's Russian but don't worry, content doesn't matter at this point) and click the first link. It's very experimental so please don't use it if you have sensitive data in your browser.