Make the tag of the page you're on (and up to 300 synonymous/meta/sub/parent/child tags) more visually distinct
It compares each tag in a work blurb with the tag in the title of the page (optionally also with its related tags) and re-styles the ones that match.
There's a SETTINGS section at the beginning where you can change:
true it may open the tags landing page on its own in the background, making you hit the rate limit ("Retry later.") faster.