Chrome扩展manifest V3变化、升级迁移指南_chrome_ZK645945-华为云开发者联盟 (csdn.net)

1.background

//V2
"background": "background.js"//V3
"background": {"service_worker": "background.js"}

2.executeScript

//V2
chrome.tabs.executeScript({file: 'script.js'
});//V3
"permissions": ["scripting"]async function getCurrentTab() {/* ... */}
let tab = await getCurrentTab();chrome.scripting.executeScript({target: { tabId: tab.id },files: [ 'script.js' ]
});

3.action

browser_action 改为 action。