Extension testing

One skill for MetaMask Extension functional testing. Classify the task, pick the layer, then open only the matching reference.

Flakiness note: Unlike Mobile (where Jest unit flakiness is a separate skill), Extension E2E flakiness lives inside this skill under references/e2e/flakiness.md — create and maintain share one tree.

When To Use

• Writing, fixing, or reviewing MetaMask Extension unit, integration, or Selenium E2E tests
• Choosing the right Extension test layer (unit vs integration vs E2E)
• Creating or updating page objects, flows, or fixtures (FixtureBuilderV2)
• Fixing E2E flakes or auditing POM anti-patterns
• MMQA testing-skills work that targets Extension (for example MMQA-2274)