Examine source code of Simple Image Editor

{
  "action": {
    "default_title": "Simple Image Editor",
    "default_popup": "editor.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png"
    }
  },
  "description": "A Simple Image Editor. You can convert your firefox into a full featured image editor",
  "manifest_version": 3,
  "name": "Simple Image Editor",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "version": "1.0.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{957e076a-3f5b-4922-b589-d33ebcd3d9c4}"
    }
  }
}