Examine source code of TabReport

{
  "description": "Reports tab events to a native host",
  "manifest_version": 2,
  "name": "TabReport",
  "version": "0.3.0",
  "icons": {
    "48": "icons/tabreport.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tabreport@diegoveralli.net",
      "strict_min_version": "86.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/tabreport.svg"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "nativeMessaging"
  ]
}