Unverified50% confidenceFactExact time
内容脚本（Content Script）是浏览器扩展API的核心能力，由Google在2009年推出Chrome扩展体系时正式标准化，后被Firefox、Edge等主流浏览器采纳
1
Sources
50%
Confidence
Long-term
Relevance
7/20/2026
First Seen
Sources
Related Claims
UnverifiedModern browser extensions primarily follow the WebExtensions API standard, which was led by Mozilla, and has been adopted by mainstream browsers including Chrome, Firefox, and Edge.77% similarUnverifiedThe structure of browser extensions is highly standardized, consisting of a manifest.json that declares permissions and a content script that injects code.76% similarUnverifiedWhen developing browser extensions, the Build Web App mode should be chosen, because an extension is essentially code running inside a webpage.68% similarUnverifiedThe browser extension structure consists of two parts: manifest.json declaring permissions and content script injecting code68% similarUnverifiedA standard Chrome extension consists of manifest.json, popup.html, background.js, and content scripts66% similar
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