The following browsers have native support for the Web Components features used by @microsoft/fast-element, including the native globalThis required by v3:

• Microsoft Edge 79+
• Mozilla Firefox 65+
• Google Chrome 71+
• Apple Safari 12.1+
• Opera 58+
• iOS Safari 12.2+
• Android Browser 81+
• Opera Mobile 54+
• Chrome for Android 81+
• Firefox for Android 68+
• Samsung Internet 10.0+

FAST Element v3 no longer polyfills globalThis for older engines. If you need to support an environment below these minimums, load a globalThis polyfill before importing FAST.