Text Fragment by sycxyc

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.

This extension is open source and you can file bug reports on the GitHub issue.