Checksub - Custom Subtitles

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Checksub - Custom Subtitles",
  "version": "0.0.0.1",
  "description": "🌈 Custom your subtitles on Youtube and Netflix",
  "author": "Florian Stègre",
  "manifest_version": 2,
  "content_security_policy": "script-src 'self' https://www.google-analytics.com; object-src 'self'",
  "background": {
    "scripts": [
      "scripts/service_worker.js"
    ],
    "persistent": true
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "assets/images/logo64.png",
    "32": "assets/images/logo64.png",
    "48": "assets/images/logo64.png",
    "128": "assets/images/logo64.png"
  },
  "browser_action": {
    "default_popup": "layout/index.html",
    "default_icon": {
      "16": "assets/images/logo.png",
      "32": "assets/images/logo.png",
      "48": "assets/images/logo.png",
      "128": "assets/images/logo.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://youtube.com/*",
        "*://www.netflix.com/*",
        "*://*.netflix.com/*"
      ],
      "js": [
        "scripts/main.js"
      ]
    }
  ]
}