Examine source code of File Upload Alert

{
  "manifest_version": 2,
  "name": "File Upload Alert",
  "version": "1.1",
  "description": "Alerts users when a file upload is detected on any website.",
  "permissions": [
    "notifications",
    "storage",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons.svg"
  },
  "icons": {
    "16": "icons.svg",
    "48": "icons.svg",
    "128": "icons.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3829dda9-4b34-4dbb-83e5-a70aeed0bd0b}"
    }
  }
}