Examine source code of toki

{
  "manifest_version": 2,
  "name": "toki",
  "version": "1.0",
  "description": "toki pona popup dictionary!",
  "icons": {
    "48": "toki-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "toki.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a9954c3c-6575-4715-a14a-cf37fd3289b9}"
    }
  }
}