Examine source code of GitLab Key Press Addon

{
  "manifest_version": 2,
  "name": "GitLab Key Press Addon",
  "version": "1.4",
  "description": "Press 3x 'v' to automark currently opened file in gitlab merge requests.",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://gitlab.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "48": "icons/gitlab-logo-500.svg",
    "96": "icons/gitlab-logo-500.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{17330881-8330-4180-b3eb-adb719a5b725}"
    }
  }
}