Examine source code of SharpFocus

{
  "manifest_version": 3,
  "name": "SharpFocus",
  "version": "1.0",
  "description": "Focus on youtube videos by blocking distractions.",
  "author": "Macha Melli",
  "homepage_url": "https://github.com/MachaMelli/SharpFocus",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "*://*.youtube.com/*",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content_scripts/focus-mode.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_scripts/overlay.js"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "SharpFocus",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "SharpFocus@MachaMelli",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "assets/*.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}