Examine source code of CCD Browser Extension

{
  "description": "CCD Browser Extension: utilisation de CCD en mode RDS",
  "homepage_url": "https://www.fdimatelec.com",
  "manifest_version": 2,
  "name": "CCD Browser Extension",
  "version": "1.3.3",
  "icons": {
    "48": "icons/ccd-48.png"
  },
  "minimum_chrome_version": "19.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "ccd_ext@fdimatelec.com",
      "strict_min_version": "50.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "nativeMessaging",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ]
}