Examine source code of deer-timestamp

{
  "name": "Mon extension",
  "version": "1.0.0",
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "ts_extension@emiliUn.fr"
    }
  },
  "browser_action": {
    "default_title": "Ts converter",
    "default_popup": "index.html"
  },
  "icons": {
    "512": "assets/ico512-7.png"
  },
  "background": {
    "scripts": [
      "scripts/main_script.js"
    ],
    "persistent": true
  }
}