Examine source code of Semaphore CI Notifier

{
  "name": "Semaphore CI Notifier",
  "version": "22.7.20",
  "description": "A browser extension to notify of build outcome in Semaphore CI classic",
  "homepage_url": "https://github.com/browniebroke/semaphoreci-notifier",
  "manifest_version": 2,
  "minimum_chrome_version": "74",
  "applications": {
    "gecko": {
      "id": "{b41f8e76-5c6d-444a-910d-a5a69e095e5d}",
      "strict_min_version": "48.0"
    }
  },
  "icons": {
    "128": "icon.png"
  },
  "permissions": [
    "notifications"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "browser-polyfill.min.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://semaphoreci.com/*"
      ],
      "include_globs": [
        "*/builds/*",
        "*/deploys/*"
      ],
      "js": [
        "browser-polyfill.min.js",
        "content.js"
      ]
    }
  ]
}