Get Facebook Access Token

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "version": "3.0.0",
  "manifest_version": 3,
  "default_locale": "en",
  "short_name": "access-token",
  "name": "__MSG_ext_name__",
  "description": "__MSG_ext_description__",
  "permissions": [
    "storage",
    "webRequest"
  ],
  "host_permissions": [
    "*://*.facebook.com/*"
  ],
  "homepage_url": "https://www.adspower.net",
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "__MSG_ext_name__"
  },
  "background": {
    "service_worker": "libs/background.js"
  },
  "icons": {
    "16": "img/icon_16.png",
    "48": "img/icon_48.png",
    "128": "img/icon_128.png"
  }
}