I wrote a simple Firefox extension some time ago for myself. It copies the current URL as a Markdown link, and if there's text selected, it copies that too. I use it all the time to paste links into my notes. Maybe someone will find it useful. I know there are many extensions like this, but they all seem too complicated — this one is just a single button, and doesn't require extra permissions.

Link to extension: https://addons.mozilla.org/en-US/firefox/addon/copy-page-link-md/

External Attachment: Demo of using the extension.

This is to much fun