Examine source code of Browser Guard

{
  "manifest_version": 2,
  "name": "Browser Guard",
  "version": "1.0",
  "description": "A minimal Malwarebytes-style browser guard that blocks known malicious domains.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "victoriamel.f.or.d.36.5@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ]
}