Examine source code of Text to Write

{
  "manifest_version": 2,
  "name": "Text to Write",
  "version": "1.2.0",
  "description": "Simulates human typing into any focused input field or textarea.",
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "sidebar_action": {
    "default_panel": "sidebar.html",
    "default_title": "Text to Write",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png"
    }
  },
  "browser_action": {
    "default_title": "Open Text to Write",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{1f4b745c-2403-42d0-a009-43209c31cb43}"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "typing-options.js",
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ]
}