Examine source code of GitHub SHA Compare

{
  "manifest_version": 3,
  "name": "GitHub SHA Compare",
  "version": "1.1",
  "description": "Adds a button to compare branches with specific SHA",
  "icons": {
    "128": "icon.svg"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://github.com/*/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "missing-gh-compare@kitallis.in",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}