Examine source code of Shut Your Context!

{
  "manifest_version": 2,
  "name": "Shut Your Context!",
  "version": "0.6",
  "description": " Removes annoying context tabs from youtube.",
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "128": "icons/icon-128.png"
    },
    "browser_style": true,
    "default_popup": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4d82f369-133c-4fbd-87f2-8e377ad72d1e}",
      "strict_min_version": "58.0"
    }
  }
}