Examine source code of GitHub PR Check Status

{
  "manifest_version": 3,
  "name": "GitHub PR Check Status",
  "description": "provides better UI for PR check status details",
  "version": "1.0.2",
  "content_scripts": [
    {
      "matches": [
        "*://github.com/*/*/pull/*"
      ],
      "js": [
        "js/content.js"
      ]
    }
  ],
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "gh-pr-ext@gmail.com",
      "strict_min_version": "42.0"
    }
  }
}