Examine source code of Twitter Blocker

{
  "manifest_version": 2,
  "name": "Twitter Blocker",
  "version": "1.0.0",
  "description": "Block Twitter/X visits and embedded tweets across the web. Toggle on/off and whitelist sites where you still want to see embeds.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "tabs",
    "*://twitter.com/*",
    "*://*.twitter.com/*",
    "*://x.com/*",
    "*://*.x.com/*",
    "*://*.twimg.com/*",
    "*://platform.twitter.com/*",
    "*://*.t.co/*"
  ],
  "browser_action": {
    "default_title": "Twitter Blocker",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{09377973-9a83-411c-966b-abeb6dbcba40}"
    }
  }
}