I'm a Firefox user, but doesn't Chrome allow adblockers too? Both uBlock Origin and Privacy Badger are supported extensions on Chrome.

Thanks for the response and info. Another day where I'm glad to be a FF user.

There's a setting in Plex which looks for changes to its folders, and refreshes your library automatically. I have that on, and I see my *arr shows/movies in Plex within a minute or two of being added.