Only partially highlighted text. Search for bookmarklet mentioned on Rogue Amoeba, which worked for me.

Seems buggy. "copy link to text" works fine but actual scroll to+highlight text only works sporadically. Never works at all without refresh/new tab. Eagerly waiting for Mozilla to just make this part of the browser core.

It was one of my favorite add-ons,
unfortunately, it does not seem to work with Firefox 116. Possibly it has to do with Firefox not supporting links to text?