Examine source code of GitHop

{
  "manifest_version": 2,
  "name": "GitHop",
  "version": "2.5",
  "description": "Go to the GitHub URL you are thinking of",
  "permissions": [
    "tabs",
    "history"
  ],
  "icons": {
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "128": "icon128.png"
    },
    "default_title": "GitHop",
    "default_popup": "popup.html"
  },
  "commands": {
    "_execute_browser_action": {}
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e26e1dd3-7a52-4ab6-9e47-454091505e2a}"
    }
  }
}