wxt/docs/guide/essentials/e2e-testing.md

E2E Testing

Playwright

Playwright is the only good option for writing Chrome Extension end-to-end tests.

To add E2E tests to your project, follow Playwright's Chrome Extension docs. When you have to pass the path to your extension, pass the output directory, /path/to/project/.output/chrome-mv3.

For a complete example, see the WXT's Playwright Example.