Examine source code of PromptPen

{
  "manifest_version": 2,
  "name": "PromptPen",
  "description": "AI-powered writing assistant",
  "version": "0.3.0",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "promptpen@frontendweb.agency"
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "onnx/*",
    "transformers-adapter.js",
    "content-scripts/content.css"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "PromptPen",
    "default_popup": "popup.html",
    "theme_icons": [
      {
        "light": "icon-light-16.png",
        "dark": "icon-dark-16.png",
        "size": 16
      },
      {
        "light": "icon-light-32.png",
        "dark": "icon-dark-32.png",
        "size": 32
      },
      {
        "light": "icon-light-48.png",
        "dark": "icon-dark-48.png",
        "size": 48
      },
      {
        "light": "icon-light-128.png",
        "dark": "icon-dark-128.png",
        "size": 128
      }
    ]
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}