Examine source code of Fixvx URL Modifier

{
  "manifest_version": 2,
  "name": "Fixvx URL Modifier",
  "version": "1.3",
  "description": "Modifies Twitter(X) URLs to start with 'fixv' and copies the modified URL. Allows for easier sharing.",
  "permissions": [
    "https://x.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://x.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon_16.png",
    "48": "icons/icon_48.png",
    "128": "icons/icon_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "fixvx-url-modifier@example.com",
      "strict_min_version": "58.0"
    }
  }
}