Examine source code of Distraction Timer

{
  "name": "Distraction Timer",
  "description": "Focus timer that blocks distracting content.",
  "version": "1.0.0",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Distraction Timer",
    "default_icon": {
      "48": "icons/logo-48.png"
    }
  },
  "icons": {
    "48": "icons/logo-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "websites-content-script/youtube.js"
      ]
    },
    {
      "matches": [
        "*://*.instagram.com/*",
        "*://*.reddit.com/*",
        "*://*.tiktok.com/*",
        "*://*.facebook.com/*",
        "*://*.twitter.com/*",
        "*://*.x.com/*",
        "*://*.youtube.com/*",
        "*://*.netflix.com/*",
        "*://*.hulu.com/*",
        "*://*.twitch.tv/*",
        "*://*.pinterest.com/*",
        "*://*.snapchat.com/*",
        "*://*.discord.com/*",
        "*://*.tumblr.com/*",
        "*://*.roblox.com/*",
        "*://*.steamcommunity.com/*",
        "*://*.epicgames.com/*",
        "*://*.primevideo.com/*",
        "*://*.disneyplus.com/*",
        "*://*.hbo.com/*",
        "*://*.kick.com/*",
        "*://*.9gag.com/*",
        "*://*.deviantart.com/*"
      ],
      "js": [
        "websites-content-script/full-block.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "*://www.youtube.com/*",
    "*://m.youtube.com/*",
    "*://i.ytimg.com/*",
    "webRequest",
    "storage",
    "webRequestBlocking",
    "tabs",
    "notifications"
  ],
  "web_accessible_resources": [
    "images/test.jpg"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b76c4a88-f4f9-4576-9f4e-a6c0e1e0a450}"
    }
  }
}