Examine source code of Content In Context

{
  "manifest_version": 3,
  "name": "Content In Context",
  "version": "1.0",
  "description": "Shows PR descriptions in the Files Changed tab on GitHub",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://github.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "content-in-context@example.com",
      "strict_min_version": "109.0"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://github.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ]
}