Since Tampermonkey seems to be misbehaving, consider using Violentmonkey. Source: 6 months ago

Step 1Install violentmonkey (or your favorite user script manager). Source: 11 months ago

Sounds like a good violent monkey [0] script for you do this weekend. :) [0] https://violentmonkey.github.io/. - Source: Hacker News / about 1 year ago

Toolbox is great, but if that is all you really need, here's this! You can copy and paste this as a new script to use in ViolentMonkey [AMO] or whatever script manager you use. Source: about 1 year ago

You want a user script extension, use ViolentMonkey for that kind of task. Source: about 1 year ago

Genius was working on something similar for a while, but I don't think it ever took off: https://genius.com/web-annotator. - Source: Hacker News / over 1 year ago

Does Genius Web Annotator still work? I used it years ago and found it pretty handy: https://genius.com/web-annotator. - Source: Hacker News / almost 2 years ago

Maybe try some of these https://genius.com/web-annotator https://www.getpoint.co/. - Source: Hacker News / over 2 years ago

The lyrics site Genius also attempted this[1][2] 1. https://genius.com/web-annotator. - Source: Hacker News / over 2 years ago

I think people have done stuff like this? Maybe not for full (and long) novels, but at least for non-fiction articles. Here's a place which has a tool for that: https://genius.com/web-annotator. Source: about 3 years ago