Of course there are many other bad design decisions that go into requiring me to do this, but it's still a real example of why all text should be selectable.
For a demo of click-to-highlight, install IPvFoo and use your mouse in the popup window. See the 'selectWholeAddress' function in https://github.com/pmarks-net/ipvfoo/blob/master/src/popup.j...
Hover shows icon for copy rich link Clicking shows menu with copy plain text, copy rich link, search for backlinks, etc Element itself is a link that can be ⌘-clicked, right clicked etc
This is a standard UI convention used by all internal dev tools at my current company.