Examine source code of Distubeless

{
  "manifest_version": 2,
  "name": "Distubeless",
  "version": "0.2",
  "author": "Almaz Mingaleev <almazglaz@gmail.com>",
  "permissions": [
    "storage"
  ],
  "description": "Allows to hide some elements of youtube interface",
  "icons": {
    "48": "icons/distubeless-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "distubeless.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js",
      "constants.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/distubeless-48.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "applications": {
    "gecko": {
      "id": "almazglaz@gmail.com",
      "strict_min_version": "57.0"
    }
  }
}