Examine source code of Quoth

{
  "manifest_version": 2,
  "name": "Quoth",
  "description": "YouTube transcript viewer with client-side formatting",
  "version": "0.2.2",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "unlimitedStorage",
    "contextMenus",
    "*://*.youtube.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "quoth@tednaleid.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Quoth"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    },
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content-scripts/youtube-player.js"
      ],
      "world": "MAIN"
    }
  ],
  "browser_action": {
    "default_title": "Quoth"
  }
}