Examine source code of Simple Url Switcher

{
  "manifest_version": 3,
  "name": "Simple Url Switcher",
  "version": "3.1001.10005",
  "description": "Switch url fluidly (for example youtube/soundcloud in keeping the progression) from your current device to another",
  "options_page": "settings.html",
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage",
    "scripting"
  ],
  "background": {
    "scripts": [
      "sw.js"
    ]
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "integrations/*.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "simple_url_switcher@lp177.fr",
      "strict_min_version": "109.0"
    }
  }
}