This_text_should_be_highlighted.
HOW TO USE:

  1. Look at the contents bar below. Click the contents link below the "Click the below Contents link" link.
  2. Scroll back up.
  3. Reload the page
  4. The above text should be highlighted.
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If you're looking here, you're in the wrong place... Go up and follow the instructions.

:~:text=This_text_should_be_highlighted.

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Now scroll back up and reload.

How it works

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Putting "#:~:text=" followed by text to the end of the URL highlights that text. You'll notice that clicking on a WP heading adds a "#", so I just had to add the ":~:text=". I don't think this really qualifies as a "glitch" more of a "loophole".

A pointless heading

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This heading is only here so I have enough headings to generate a contents box.