Examine source code of GitLab Styles

{
  "manifest_version": 2,
  "name": "GitLab Styles",
  "version": "1.67.0",
  "description": "Add some custom stylings to GitLab",
  "permissions": [
    "activeTab",
    "storage",
    "webNavigation"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "icons/active-icon.png",
    "default_title": "Toggle GitLab CSS"
  },
  "content_scripts": [
    {
      "matches": [
        "*://gitlab.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "styles.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{51a7109e-e860-4ff5-b8c9-99814eade646}"
    }
  }
}