This update does not collect anything the previous version didn't. Mozilla's disclosure format changed, Keepa didn't.
Since Firefox 140, add-ons must declare data handling using a fixed list of categories, and Firefox shows that list when an add-on updates.
What Keepa actually does:
• On an Amazon product page, the extension sends that product's ASIN to keepa.com so the price chart can be drawn. It is not logged and not retained.
• Nothing about your browsing is stored unless you explicitly choose to track a product.
• Your Keepa session token is sent so your own settings and tracked products load. It's a login credential for your Keepa account - not your name, email or address.
• The extension runs only on Amazon product pages and keepa.com. Nowhere else.
• Browser type and add-on version are now optional and can be switched off in Firefox's add-on settings. This release added that control; it didn't exist before.