Flaggr CDN

https://cdn.flaggr.dev/a.js
  Flaggr browser analytics, @flaggr/analytics-script 0.1.2. Cached for an hour; moves to each release.
  <script src="https://cdn.flaggr.dev/a.js" data-site-id="site_..." defer></script>

https://cdn.flaggr.dev/sdk.js
  Flaggr SDK browser bundle (window.flaggr), @flaggr/sdk 0.4.0. Cached for an hour; moves to each release.
  <script src="https://cdn.flaggr.dev/sdk.js" data-service-id="..." defer></script>

Pinned versions never change. Pin one with Subresource Integrity:
  <script src="https://cdn.flaggr.dev/sdk-<version>.js" integrity="sha384-..." crossorigin="anonymous" ...></script>

  /a-0.1.2.js    sha384-B75y6hAY/vimI6XkEFLQ06C/tiTZQ26Qd5pkVjp2w2/a6ILgeH5YyfgEbE6abhFZ
  /a-0.1.1.js    sha384-lOtH0vXwAu2l8fpMj2dioOji716l0pBcpIj71MMlF64G/yFRTQTjOkQc+uDkb0sd
  /a-0.1.0.js    sha384-mOgr0x8az2EMq40PCDeO/aftg3WOgBQ8t4z4FH8Jq+2fjutYFHM2fnJymDEgyUvV
  /sdk-0.4.0.js  sha384-jjDxi4XRdiP9sgrAYjukEGXn7j2/Oj4cAqUz22AmTrqxhrsMQtkoGtyVkR+mm/qs
  /sdk-0.3.0.js  sha384-/Uj8XBeRxGaTvebXP3m9ccJ86MjDA6FNMPrfUr6PUHAHDCfE9a9ILw+DbI2F5eG+

Sizes and hashes: https://cdn.flaggr.dev/manifest.json
Docs: https://flaggr.dev/docs/guides/browser-analytics