The short answer is yes, often with minimal effort . But the long answer—involving browser APIs, manifest versions, and architectural differences—is where the real story lies. The key enabler of cross-browser extension compatibility is the WebExtensions API . In 2015, Mozilla announced that Firefox would adopt a Chrome-compatible extension architecture, effectively standardizing on the model Google pioneered. By 2017 (Firefox 57), legacy XUL and Add-on SDK extensions were deprecated, and WebExtensions became the only way to build Firefox add-ons.
Introduction For over a decade, Google Chrome has dominated the browser market, largely due to its speed, simplicity, and—most importantly—its vast extension ecosystem. However, as privacy concerns grow and users seek more open, customizable experiences, Mozilla Firefox has experienced a renaissance. Firefox’s recent technical overhaul (Firefox Quantum and beyond) has made it competitive again, but one question remains central for users: “Can I use my favorite Chrome extensions on Firefox?” chrome extension to firefox
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