Examine source code of ShortNews

{
  "manifest_version": 2,
  "name": "ShortNews",
  "short_name": "ShortNews",
  "description": "Preview linked news articles on public HTTPS pages before opening them.",
  "version": "0.4.5",
  "homepage_url": "https://github.com/goku1248/ShortNews",
  "browser_specific_settings": {
    "gecko": {
      "id": "shortnews-firefox-android@goku1248.github",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteContent"
        ],
        "optional": [
          "personalCommunications",
          "technicalAndInteraction"
        ]
      },
      "strict_min_version": "142.0"
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_title": "ShortNews",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    }
  },
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "storage",
    "tabs",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "config.js",
      "site-policy.js",
      "background.js"
    ],
    "persistent": false
  },
  "web_accessible_resources": [
    "icons/shortnews-popup-logo.png"
  ]
}