I absolutely cannot understand why this isn't a more popular add-on. Even if the date is hidden, it still tells you how old the information is.

This is not bad at all. We're not very far from the mark. As the author states, it doesn't work on every website, which is to be expected.

I would like to know if this Add-On focuses more on News Outlet Websites, or if it's meant for any Website at all. I'm more interested in knowing the date of certain published articles of any Website where the authors themselves don't specify the publishing date (is this information 8 years old or is it fresh from this year?).