Examine source code of imgding-m

{
  "description": "Downloads images from image hosts.",
  "manifest_version": 2,
  "name": "imgding",
  "version": "41",
  "icons": {
    "48": "icons/imgding-48.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "downloads",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "polyfill/browser-polyfill.min.js",
      "background/messenger.js",
      "background/discovering.js",
      "background/downloads.js",
      "background/imagehostparser.js",
      "background/imagehosts.js",
      "background/links.js",
      "background/processor.js",
      "background/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/imgding-32.png",
    "default_title": "imgding",
    "default_popup": "popup/imgding.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{030059f7-6397-4ebb-b605-5a74fe96ebf2}"
    }
  }
}