Browser Extension

A browser extension is a small software module for customizing a web browser. Browsers typically allow a variety of extensions, including user interface modifications, ad blocking, and cookie management.[1] Browser plug-ins are a separate type of module. The main difference is that extensions are usually just source code, but plug-ins are always executables (i.e. object code). As of 2021, plug-ins have been deprecated by most browsers, while extensions are widely used. The most popular browser, Google Chrome,[2] has over 100,000 extensions available but no longer supports plug-ins.[3][4]

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