Examine source code of Search Autocomplete

{
  "name": "__MSG_appName__",
  "version": "1.0.5resigned1",
  "manifest_version": 2,
  "description": "__MSG_appDescription__",
  "icons": {
    "16": "images/icon-16.png",
    "128": "images/icon-128.png"
  },
  "default_locale": "en",
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "search-autocomplete@enux.pl",
      "strict_min_version": "52.0"
    }
  },
  "permissions": [
    "<all_urls>",
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "omnibox": {
    "keyword": "sa"
  },
  "browser_action": {
    "default_icon": {
      "19": "images/icon-19.png",
      "38": "images/icon-38.png"
    },
    "default_title": "Search Autocomplete",
    "default_popup": "popup.html"
  }
}