First of all, I like your script; it's nice and concise!
Just two small observations:
It's incompatible with Google Chrome (unless Tampermonkey is installed) - due to the @require statement, requiring jQuery. You could rewrite the small bits of jQuery into vanilla JS to easily overcome this.
When the review queues look like this:
Close Votes: 52.2k
From my personal observation and from the occasional SE dev statement, many items update every 60 seconds (cached at server).
Also the page AJAX updates every 60 seconds.
(using JS like: setInterval(updateRelativeDates, 60000);)
So, per sampling theory, sampling more than once every 30 seconds gives diminishing returns.
Personally, I would just reload ...
feature-request Don't display queues the user doesn't have access to.
feature-request Add the topbar-dialog class to #userscript-dropdown, so it gets a shadow.
feature-request Emphasize the queue name and number of items in it, as they are more important than "item(s) to review".
bug This site isn't in the list of @includes.
I am not sure why it has suddenly stopped working. It doesn't collect any data but it seems to visit the sites. There are no stats displayed. Just blank.
feature-request Add the "reviews" tab to network profiles of other users as well.
If this userscript works on my profile, can't it also work on the profile of other users? It'd be useful to see how my contribution compares to that of other users.
I can't review ignored queues or check the status of any queue by clicking "Recent reviews".
If I try to choose an ignored queue, no matter how - in the same tab or in a new tab, after a timeout occurs I will be returned to the main review page or the new tab will be closed. The same happens if I'm trying to check a queue status.
Is this behavior a bug or ...
feature_request(customization): ignoring specific types of review
It would be nice, if would be option — ignore some types of review.
user can have gold badges for some review types and doesn't have badges for another types
user can more prefer some types of review, than others
I want to ignore Close Votes and Low ...
Something caused it for me to keep opening "first posts", even when it's empty. It also doesn't go back to the overview. Reinstalling did not fix it, factory reset and then setting all settings again did fix it.
I definitely did complicated things with it, like restarting Chrome with a review tab open, Windows hibernation, pausing and resuming the script in ...
The script is working except in the Suggested Edits review queue, since the .subheader h2:first does not exist for that queue.
Can you please add some workaround for the Suggested Edits review queue?