Examine source code of Scroll Detox: YouTube·Reddit Feed Blocker

{
  "manifest_version": 2,
  "name": "Scroll Detox: YouTube & Reddit Feed Blocker",
  "description": "Block distracting content on YouTube and Reddit. Focus on what matters.",
  "version": "0.1.6",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "web_accessible_resources": [
    "images/capybara.webp"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "sns-detox@easydev.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {}
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Scroll Detox",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "browser_style": false,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*",
        "*://*.youtube.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/content.js"
      ]
    },
    {
      "matches": [
        "*://*.google.com/*",
        "*://accounts.google.com/*",
        "*://accounts.youtube.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/stealth.js"
      ],
      "world": "MAIN"
    }
  ]
}