Examine source code of Always active tab

{
  "manifest_version": 3,
  "name": "Always active tab",
  "version": "7.18.2",
  "description": "A lightweight extension that tries to tell sites you’re always active without breaking them.",
  "permissions": [
    "scripting",
    "tabs",
    "webNavigation",
    "storage"
  ],
  "optional_permissions": [
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>",
    "file://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "96": "icon-96.png"
    }
  },
  "icons": {
    "96": "icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "always-active-tab@foruserbyuser.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "140.0"
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}