Examine source code of Alt Text for Facebook

{
  "manifest_version": 2,
  "name": "Alt Text for Facebook",
  "version": "1.2resigned1",
  "description": "See how Facebook's latest AI is doing by viewing the auto-generated alt-text captions. The extension isn't affiliated with Facebook.",
  "content_scripts": [
    {
      "matches": [
        "*://*.facebook.com/*"
      ],
      "js": [
        "ViewAltCap.js"
      ]
    }
  ],
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "96": "images/icon96.png",
    "128": "images/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{73116e81-4097-4182-bde9-077eea691582}"
    }
  }
}