WebExtensionsrajapintaa

WebExtensions API is a cross-browser extension framework. It allows developers to create browser add-ons that function similarly across different web browsers such as Chrome, Firefox, Edge, and Opera. The API is based on the Mozilla extension system and is designed to be more secure and stable than older extension technologies.

The WebExtensions API provides a set of JavaScript APIs that extensions can use to interact with the browser and its content. These APIs allow extensions to perform various tasks, including modifying web pages, managing tabs, handling user input, and communicating with web services. Key features include background scripts that run independently of web pages, content scripts that can inject JavaScript into web pages, and a declarative API for defining extension behavior.

Security is a primary focus of the WebExtensions API. It employs a permission system that requires users to explicitly grant extensions access to specific browser features and data. This helps protect users from malicious extensions that might try to access sensitive information without their consent. Furthermore, extensions run in a sandboxed environment, limiting their access to the operating system and other parts of the browser.

The goal of WebExtensions is to provide a unified platform for extension development, reducing the need for developers to write separate versions of their add-ons for each browser. This standardization simplifies the development process and promotes wider compatibility for browser extensions. While largely compatible, minor differences in API support and behavior may exist between browsers.