Examine source code of HotmailFix

{
  "manifest_version": 3,
  "name": "HotmailFix",
  "description": "Cleans up specific ads from hotmail UI",
  "version": "1.0.0",
  "icons": {
    "48": "HotmailFix_48x48.png",
    "128": "HotmailFix_128x128.png"
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "https://outlook.live.com/*"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "HotmailFix_128x128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5c8abdef-9748-4736-adfc-d6fc413c1bf7}"
    }
  }
}