Examine source code of block_consultant

{
  "manifest_version": 2,
  "name": "block_consultant",
  "version": "1.0",
  "permissions": [
    "webRequest",
    "<all_urls>",
    "activeTab",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c3572556-46f8-4012-98af-26595129aa12}"
    }
  }
}