Works pretty good! 4 ★ since it doesn't work with all URLs, such as:

https://docs.python.org/3/library/dataclasses.html?highlight=dataclass#module-dataclasses

In this case, the existence of a section reference messes up the recognition. The extension "UnHighlight" (https://github.com/Quincunx271/UnHighlight) does seem to do this correctly.