Examine source code of PopupX - YT Popup Player

{
  "version": "1.1.5",
  "name": "PopupX - YouTube Popup Player",
  "description": "Watch YouTube videos in an overlay without leaving the page. Enjoy a cleaner browsing experience.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png",
    "256": "icons/icon-256.png",
    "512": "icons/icon-512.png"
  },
  "action": {
    "default_popup": "action/index.html",
    "default_title": "PopupX - YouTube Popup Player"
  },
  "options_ui": {
    "page": "options/index.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage",
    "alarms",
    "contextMenus",
    "declarativeNetRequest",
    "notifications",
    "tabs"
  ],
  "host_permissions": [
    "*://*.youtube.com/*",
    "*://youtube.com/*",
    "*://youtu.be/*",
    "*://*.youtube-nocookie.com/*",
    "*://*.ytimg.com/*",
    "https://iframe.zypho.dev/*",
    "https://zypho.dev/*"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": true,
        "path": "declarative_net_request/ruleset_1.json"
      }
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://youtube.com/*",
        "*://youtu.be/*"
      ],
      "js": [
        "content_scripts/content-0.js"
      ],
      "css": []
    },
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://youtube.com/*",
        "*://*.youtube-nocookie.com/*"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "js": [
        "content_scripts/content-1.js"
      ],
      "css": []
    }
  ],
  "commands": {
    "popup-focused": {
      "suggested_key": {
        "default": "Alt+Shift+P",
        "mac": "Alt+Shift+P"
      },
      "description": "Popup the focused or hovered video"
    },
    "toggle-mini": {
      "suggested_key": {
        "default": "Alt+Shift+M",
        "mac": "Alt+Shift+M"
      },
      "description": "Toggle miniplayer for the current popup"
    },
    "close-popup": {
      "suggested_key": {
        "default": "Alt+Shift+X",
        "mac": "Alt+Shift+X"
      },
      "description": "Close the current popup"
    },
    "open-search": {
      "suggested_key": {
        "default": "Alt+S",
        "mac": "Alt+S"
      },
      "description": "Open floating YouTube search"
    }
  },
  "author": "willydev",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "searchTerms"
        ]
      },
      "id": "{1111a235-dc03-4457-916d-5d31d321a86b}"
    }
  },
  "background": {
    "scripts": [
      "background/scripts.js"
    ],
    "persistent": false
  }
}