Examine source code of Bulk Image Saver

{
  "manifest_version": 2,
  "name": "Bulk Image Saver",
  "version": "0.03beta",
  "description": "Save all displayed images and linked images on a webpage in one click!",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "background-script.js"
    ]
  },
  "permissions": [
    "menus",
    "downloads",
    "activeTab",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{917b3b6f-79f0-4cc6-b5e5-05b481b2f925}"
    }
  }
}