Examine source code of Tolon Browser Extension

{
  "manifest_version": 2,
  "name": "Tolon Browser Extension",
  "version": "0.6.1",
  "description": "Find webpage discussions on the web. (e.g. Hacker News, Reddit)",
  "homepage_url": "https://github.com/rwanyoike/tolon-browser-extension",
  "icons": {
    "64": "images/icon.png",
    "128": "images/icon@2x.png"
  },
  "browser_action": {
    "default_popup": "index.html"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{987cb8a3-cdad-407c-94be-c18734f0e2ae}"
    }
  }
}