Text Fragment v1.1
Text fragment (#:~:text) allow linking directly to a specific portion of text in a web document, without requiring the author to annotate it with an ID, using particular syntax in the URL fragment. it could be used to generate more effective content-sharing links for users to pass to one another.
Notes:
* Firefox for Android currently does not support the context menu, you need to click on the extension icon instead.
Specification:
* https://wicg.github.io/scroll-to-text-fragment/
This extension is open source and you can file bug reports on the GitHub issue.