Interesting, I don't know javascript though. In chrome I use the Automa extension, which is connecting lines with blocks (and you still have to pick up some js. I didn't even know what an 'element' was when I started). Even a beginner can do something useful after an hour of study or so. YMMV.
Summarizing quote: “We are going to build a web scraper that monitors the Toastmasters web portal and notifies me as soon as roles for an upcoming meeting become available for selection.”
For some reason this submission was stopped showing up anywhere on Hacker News a couple of hours after I published it. Perhaps because the link was broken for a little while this triggered some automatic moderation.
https://github.com/AutomaApp/automa
https://docs.automa.site/
There's a library of scripts you can copy from
https://www.automa.site/workflows