Examine source code of Secure Password Generator

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.0.10resigned1",
  "default_locale": "en",
  "homepage_url": "https://addons.mozilla.org/firefox/addon/secure-password-generator/",
  "icons": {
    "16": "icons/password-16.png",
    "32": "icons/password-32.png",
    "48": "icons/password-48.png",
    "64": "icons/password-64.png"
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icons/password-16.png",
      "32": "icons/password-32.png",
      "48": "icons/password-48.png",
      "64": "icons/password-64.png"
    },
    "default_title": "Secure Password Generator",
    "default_popup": "popup.html",
    "theme_icons": [
      {
        "light": "icons/password-16-light.png",
        "dark": "icons/password-16.png",
        "size": 16
      },
      {
        "light": "icons/password-32-light.png",
        "dark": "icons/password-32.png",
        "size": 32
      }
    ]
  },
  "commands": {
    "generate-password": {
      "suggested_key": {
        "default": "Alt+G"
      },
      "description": "Generate Password"
    },
    "insert-previous-password": {
      "suggested_key": {
        "default": "Alt+L"
      },
      "description": "Insert Previous Password"
    }
  },
  "background": {
    "scripts": [
      "dist/init.js",
      "dist/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "password.generator@kolya.ca"
    }
  }
}