Examine source code of X Timeline Filter

{
  "manifest_version": 2,
  "name": "X Keyword Blocker",
  "version": "0.1.0",
  "description": "Blocks tweets containing specified keywords on X.com.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "*://*.twitter.com/*",
    "*://*.x.com/*",
    "alarms"
  ],
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "Block Keywords",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*",
        "*://*.x.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f5ce5cea-7c17-4c2e-9357-d3525e9477d2}"
    }
  }
}