Examine source code of Simple Context Search

{
  "manifest_version": 2,
  "name": "Simple Context Search",
  "description": "An easy way to act a context searching with one-time selected search provider. Context Search should be Simple.",
  "version": "1.3.0",
  "default_locale": "en",
  "icons": {
    "48": "search.svg"
  },
  "permissions": [
    "contextMenus",
    "search",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "browser_style": false,
    "page": "options.html"
  },
  "applications": {
    "gecko": {
      "id": "{2a3ce252-19ba-461f-8fe5-308e280ded54}",
      "strict_min_version": "63.0"
    }
  }
}