Examine source code of Simplify YouTube sidebar

{
  "manifest_version": 2,
  "name": "simplify_yt",
  "version": "1.0",
  "description": "Removes certain buttons from the YouTube page not used by an average user.",
  "icons": {
    "48": "icons/simply-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{964e0f61-a0cd-41e5-aa68-e63912bc1ea9}"
    }
  }
}