Examine source code of wolfegami - imageviewer

{
  "manifest_version": 2,
  "name": "wolfegami",
  "version": "1.0.0.1",
  "description": "imageviewer.",
  "default_locale": "ja",
  "options_ui": {
    "page": "/options/options.html",
    "open_in_tab": true
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4ebbca59-133e-4094-ac66-8db764a8665e}"
    }
  },
  "background": {
    "scripts": [
      "/background/event.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "/img/icon16.png",
    "default_title": "wolfegami",
    "default_popup": "/popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "/common/common.js",
        "/content/collector.js"
      ],
      "css": [
        "/content/content.css"
      ]
    }
  ],
  "icons": {
    "16": "/img/icon16.png",
    "32": "/img/icon32.png",
    "48": "/img/icon48.png",
    "128": "/img/icon128.png"
  }
}