https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Content_scripts
Content scripts - Mozilla | MDN
content scriptsmozillamdn
https://developer.chrome.com/docs/extensions/reference/manifest/content-scripts
Manifest - content scripts | Chrome Extensions | Chrome for Developers
Aug 10, 2023 - Reference documentation for the "content_scripts" property of manifest.json.
content scriptschrome extensionsfor developersmanifest