Examine source code of My Dictionary

{
  "manifest_version": 2,
  "name": "My Dictionary",
  "version": "1.0",
  "description": "Create your own dictionary for your own words for your languaes of your choice",
  "homepage_url": "https://github.com/dhmm/MyDictionary",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/icon-32.png",
    "theme_icons": [
      {
        "light": "icons/icon-32.png",
        "dark": "icons/icon-32.png",
        "size": 32
      }
    ],
    "default_title": "My Dictionary",
    "default_popup": "popup/my_dictionary.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{51e6c5c8-64fd-4bba-a27e-5a4066e134d0}"
    }
  }
}