Fair. 0.8.0 suggests US-based alternatives to a product, so it sends the products you open (ASIN, title, brand, seller). A second feature sends seller IDs to show where a seller is based.

Both are on by default, both switch off in options, and filtering works without either. Stored is a per-product view counter: no IP, no account, no searches.

Unfortunately, Firefox only offers fixed permission labels, and none are narrower than that.