Examine source code of Bee Image Downloader

{
  "icons": {
    "16": "icon16.plasmo.e7bcd3ac.png",
    "32": "icon32.plasmo.ce39377b.png",
    "48": "icon48.plasmo.3c17e113.png",
    "64": "icon64.plasmo.df317abe.png",
    "128": "icon128.plasmo.6a4310c5.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "16": "icon16.plasmo.e7bcd3ac.png",
      "32": "icon32.plasmo.ce39377b.png",
      "48": "icon48.plasmo.3c17e113.png",
      "64": "icon64.plasmo.df317abe.png",
      "128": "icon128.plasmo.6a4310c5.png"
    },
    "default_popup": "popup.html"
  },
  "version": "2.0.0",
  "author": "379522770@qq.com",
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "background": {
    "scripts": [
      "static/background/index.js"
    ]
  },
  "permissions": [
    "webRequest",
    "tabs",
    "storage",
    "unlimitedStorage",
    "downloads",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "image-base64.2305715b.js"
      ],
      "all_frames": true,
      "css": []
    }
  ],
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{a1d188b7-be06-4ed8-8eb6-88be988e1164}"
    }
  }
}