Examine source code of inputX

{
  "manifest_version": 2,
  "name": "inputX",
  "version": "1.0",
  "description": "input management software",
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "action": {
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "/image/input_16.png",
    "48": "/image/input_48.png",
    "128": "/image/input_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "./content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0201ef8e-1839-478a-b466-ee72bcf3d423}"
    }
  }
}