Examine source code of Twitter Blocker

{
  "manifest_version": 3,
  "name": "Twitter Blocker",
  "description": "Batch block Twitter/X users",
  "version": "0.3.16",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "cookies",
    "declarativeNetRequest",
    "alarms",
    "notifications"
  ],
  "host_permissions": [
    "https://x.com/*",
    "https://store.rxliuli.com/**"
  ],
  "author": "rxliuli",
  "action": {
    "default_icon": {
      "16": "icon/16.png",
      "32": "icon/32.png",
      "48": "icon/48.png",
      "96": "icon/96.png",
      "128": "icon/128.png"
    }
  },
  "homepage_url": "https://store.rxliuli.com/extensions/twitter-blocker/",
  "browser_specific_settings": {
    "gecko": {
      "id": "twitter-blocker@rxliuli.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://x.com/*"
      ],
      "js": [
        "content-scripts/quick-block.js"
      ]
    }
  ]
}