Examine source code of Secret Bookmarks

{
  "manifest_version": 2,
  "name": "Secret Bookmarks",
  "version": "0.0.1",
  "description": "Password protected bookmarks",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "<all_urls>",
    "storage"
  ],
  "icons": {
    "16": "16.png",
    "48": "48.png",
    "64": "64.png",
    "128": "128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "16.png",
      "48": "48.png",
      "64": "64.png",
      "128": "128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2d264669-6591-4988-b62e-e17490861e97}"
    }
  }
}