Examine source code of Pinry

{
  "name": "Pinry",
  "version": "0.0.3resigned1",
  "description": "Pins images from current page to a Pinry installation.",
  "manifest_version": 2,
  "icons": {
    "48": "ico-48.png",
    "128": "ico-128.png"
  },
  "permissions": [
    "contextMenus",
    "tabs",
    "storage",
    "http://*/*",
    "https://*/*"
  ],
  "browser_action": {
    "default_icon": "ico-128.png",
    "default_title": "Pinry"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true,
    "chrome_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b006f77c-b27e-4809-8fdf-9b1549383443}"
    }
  }
}