Examine source code of Falling Metal Pipe

{
  "name": "Falling Metal Pipe",
  "version": "1.2.0",
  "description": "A metal pipe falls every time you open a tab",
  "manifest_version": 3,
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "author": "svante@swantzter.se",
  "homepage_url": "https://github.com/swantzter/crx-falling-metal-pipe",
  "browser_specific_settings": {
    "gecko": {
      "id": "falling-metal-pipe@swantzter.com",
      "strict_min_version": "109.0"
    }
  }
}