Examine source code of Rapid Url

{
  "name": "Rapid Url",
  "description": "Type 'go' followed by a defined key and then optionally a search text into the url bar and get redirected",
  "version": "1.1resigned1",
  "applications": {
    "gecko": {
      "strict_min_version": "52.0a1",
      "id": "firefox@rapidurl.com"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "settings.html",
    "open_in_tab": true,
    "browser_style": false
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "search"
  ],
  "omnibox": {
    "keyword": "go"
  },
  "manifest_version": 2
}