Examine source code of ICPBravoAccess

{
  "manifest_version": 2,
  "name": "ICPBravoAccess",
  "version": "1.1resigned1",
  "default_locale": "en",
  "description": "ICPBravo Access ICPBrasil and General PKI Extension.",
  "icons": {
    "16": "img/icon_16.png",
    "32": "img/icon_32.png",
    "64": "img/icon_64.png",
    "128": "img/icon_128.png"
  },
  "applications": {
    "gecko": {
      "id": "icpbravoaccess@scytl.com",
      "strict_min_version": "50.0"
    }
  },
  "browser_action": {
    "default_title": "ICPBravoAccess",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "img/icon_16.png",
      "32": "img/icon_32.png",
      "64": "img/icon_64.png",
      "128": "img/icon_128.png"
    }
  },
  "background": {
    "scripts": [
      "scripts/event_page.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "scripts/content_script.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "nativeMessaging",
    "storage"
  ]
}