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Coupon extensions can save time, but they need broad browser permissions to work. Here's what that means so you can decide for yourself.
What these extensions typically can see
To detect checkout pages and test codes, most shopping extensions request permission to "read and change data on the websites you visit." In practice that can include the pages you open and what's on them. Many companies say they collect shopping-related data such as product pages, prices, and purchases, and use it to find deals and earn commissions from retailers. Read each extension's privacy policy for the specifics.
How they make money
Most free coupon tools earn affiliate commissions from retailers when you buy, and some use aggregated shopping data. That's why they are free. It's the same affiliate model this site uses (see the disclosure below).
How to use one more safely
- Install only from the official store (Chrome Web Store, Firefox Add-ons, Apple App Store for Safari extensions). Copycat extensions exist.
- Check the publisher, reviews, and user count.
- Limit site access. Chrome and Safari let you restrict an extension to run only on click or on specific sites. On iPhone, go to Settings → Safari → Extensions and set website access.
- Use just one. Several coupon extensions at once multiply the data shared and can conflict.
- Remove ones you don't use.
Known examples
Capital One Shopping, Honey (owned by PayPal), and RetailMeNot are widely used. Each has its own privacy policy and data practices, so compare them. You don't need a Capital One card to use Capital One Shopping.
Bottom line
A reputable extension from an official store is a reasonable trade-off for many shoppers, but it's not risk-free. If you're uncomfortable with the access, you can get most of the benefit manually with the tips in how to find coupon codes that work.
Want all of this on one page? Our printable savings checklist sums up the 12 core tips. It unlocks after you try a sponsored app, so skip it if you'd rather not. Unlock the checklist (sponsored).