Deal Stack is a Firefox browser extension that combines multiple percentage discounts and shows the resulting final price. It is intended for shoppers who need to calculate stacked promotions while browsing online.
In the Deals, coupons & price comparison space, Deal Stack takes a focused approach. It focuses on calculating the combined effect of multiple percentage discounts on a purchase. Deal Stack is a consumer product aimed at online shoppers comparing discounted prices. Deal Stack is free to use. Deal Stack is available on the web and embeddable surfaces.
It is developed by Ronald M. Crane, and it first shipped in 2026. Among its 5 catalogued features are discount stacking, final price calculation, and firefox integration. The interface is available in 32 languages, including Czech, German, and Greek.
Summary written by a language model from the project’s public pages.
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