{"mdn_url":"https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/manifest.json/browser_action","source_file":"webextensions/manifest/browser_action.json","support":{"chrome":{"notes":["Available for use in Manifest V2 only.","If an extension defines a browser action, it is not allowed to define a page action as well."],"version_added":true},"edge":{"notes":"Available for use in Manifest V2 only.","version_added":"14"},"firefox":{"notes":"Available for use in Manifest V2 only.","version_added":"48"},"firefox_android":{"notes":"Available for use in Manifest V2 only.","version_added":"55"},"opera":{"notes":["Available for use in Manifest V2 only.","If an extension defines a browser action, it is not allowed to define a page action as well."],"version_added":true},"safari":{"notes":["Available for use in Manifest V2 only.","If an extension defines a browser action, it is not allowed to define a page action as well."],"version_added":"14"},"safari_ios":{"notes":["Available for use in Manifest V2 only.","If an extension defines a browser action, it is not allowed to define a page action as well."],"version_added":"15"}}}