Examine source code of Firewall Trump

{
  "manifest_version": 2,
  "name": "Firewall Trump",
  "version": "1.4resigned1",
  "description": "The Firewall Trump extension delivers a beautiful Trump–Free Internet experience. If he’s building a wall, we’ll build a firewall.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "websiteBlocker.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8c79b7a3-73d8-4dd6-8f47-7c41ccae0c44}"
    }
  }
}