Examine source code of Fresh Move

{
  "name": "Fresh Move",
  "description": "This extension contains todo, main-focus and weather",
  "version": "1.0.0",
  "manifest_version": 2,
  "author": "Arpit",
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Fresh Move"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2a5139d7-4d84-4eba-bd40-cb8743cbc667}"
    }
  }
}