Try our trusted guide to product reviews See how reliable product reviews are on Amazon before you buy. Review Checker, an experimental feature from Firefox, is built right into the browser. It works on Walmart and Best Buy, too. Using the power of Fakespot by Mozilla, we help you avoid biased and inauthentic reviews. Our AI model is always improving to protect you as you shop. Learn more By selecting “Yes, try it“ you agree to Firefox’s privacy policy and Fakespot’s terms of use.