Some of the most popular browsers to build extensions for include Safari, Firefox, Chrome, Opera, Brave, and Microsoft Edge.

To work directly with part of the browser, such as a window or tab, you must send API requests and must often reference the browser by name. HTML and CSS files that define the user interface.A JavaScript file that defines the function.An app manifest JSON file that contains basic platform information.An extension should include at least the following features: Examples of companion experiences include ad blockers and password managers.Īn extension is structured similar to a regular web app. You can create a Microsoft Edge extension if you have an idea or product that is based upon either a specific web browser, or improvements to features of specific webpages. It usually provides a niche function that is important to a target audience.

An extension improves a user's browsing experience. A Microsoft Edge extension is a small program that developers use to add or modify features of Microsoft Edge.

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