Komparzon does not collect, store or transmit personal data to the developer.

What the extension does with data:

• On Amazon product pages (amazon.fr, .de, .es, .it, .nl, .com.be, .co.uk, .pl, .se), the extension downloads the same product page from the other European Amazon stores and reads the price, shipping cost, rating and review summary locally, in your browser. Nothing is sent to Komparzon's servers.
• To determine your delivery country when no Amazon store shows one, the extension may query https://api.country.is/ once, which returns a two-letter country code derived from your IP address. Exchange rates (GBP, PLN, SEK to EUR) are fetched from https://open.er-api.com/. No identifier or personal data is sent with these requests.
• Your settings (selected stores, delivery country, language) are kept in Firefox's extension storage (storage.sync) and nowhere else.
• On komparzon.com, the extension hands the prices it read to the page you are viewing, inside your browser, so the site can display delivered prices.
• Purchase links contain an Amazon affiliate tag; Amazon may pay Komparzon a commission at no extra cost to you.