SuperWideZoom

manifest.json

{
  "author": "Codefinite",
  "description": "Make 21:9 Netflix, YouTube & Amazon Prime video fill a 21:9 display, removing the double letterbox effect.",
  "name": "SuperWideZoom",
  "manifest_version": 2,
  "version": "1.0.0",
  "icons": {
    "24": "icons/icon-24.png",
    "44": "icons/icon-44.png",
    "48": "icons/icon-48.png",
    "50": "icons/icon-50.png",
    "150": "icons/icon-150.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "superwide.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "Toggle superwide",
    "default_icon": {
      "20": "icons/btn-20.png",
      "25": "icons/btn-25.png",
      "30": "icons/btn-30.png",
      "40": "icons/btn-40.png"
    }
  },
  "permissions": [
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  }
}