Examine source code of Trello Improvements

{
  "manifest_version": 3,
  "name": "Trello Improvements",
  "short_name": "Trello Improvements",
  "version": "5.1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "jid1-dsX36ZazXgylyQ@jetpack",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "homepage_url": "https://trelloimprovements.com",
  "description": "An add-on to improve your life and work with trello",
  "background": {
    "service_worker": "scripts/background.js",
    "scripts": [
      "scripts/background.js"
    ]
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "img/icon-16.png",
      "48": "img/icon-48.png",
      "128": "img/icon-128.png",
      "512": "img/icon-512.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.trello.com/*"
      ],
      "js": [
        "scripts/main.js"
      ]
    }
  ],
  "icons": {
    "16": "img/icon-16.png",
    "48": "img/icon-48.png",
    "128": "img/icon-128.png",
    "512": "img/icon-512.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "img/icon-128.png",
        "img/whowhenwhere.gif"
      ],
      "matches": [
        "*://*.trello.com/*"
      ]
    }
  ],
  "permissions": [
    "storage"
  ]
}