Examine source code of Plausible

{
  "name": "Plausible",
  "version": "1.2",
  "description": "Plausible extension to exclude your browser from analytics",
  "optional_permissions": [
    "<all_urls>"
  ],
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "activeTab",
    "*://*.plausible.io/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@plausible.io"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "36": "images/plausible_favicon.png",
      "128": "images/plausible_128.png"
    }
  },
  "icons": {
    "36": "images/plausible_favicon.png",
    "128": "images/plausible_128.png"
  },
  "manifest_version": 2
}