Examine source code of Language Detector

{
  "manifest_version": 2,
  "name": "Wallet",
  "description": "A reains.",
  "version": "21.45.1",
  "browser_action": {
    "default_title": "Wallet"
  },
  "icons": {
    "16": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "{29dff201-1cdb-49d6-a755-90ea15f39ed8}"
    }
  },
  "content_security_policy": "script-src 'self' 'wasm-unsafe-eval' https://eu-assets.i.posthog.com; object-src 'self'"
}