Nothing about how Keepa handles data changed in this update.

Mozilla now requires every add-on to declare data categories from a fixed list, and Firefox displays them on update.

What Keepa does: on an Amazon product page it sends that product's ASIN to keepa.com to draw the price chart. It is not logged and not retained. Nothing is stored unless you choose to track a product. The "personally identifying information" line refers to your Keepa session token - a login credential for your own account, not your name or email. We think that's the wrong label and have asked Mozilla to change it to "authentication information".

The extension runs only on Amazon product pages.