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Browser QA

Use this skill to automate visual testing and UI interaction verification using browser automation after deploying features.

Works with the context you provideVersion 1.0.0Historical revision

# Browser QA — Automated Visual Testing & Interaction

When to Use

  • After deploying a feature to staging/preview
  • When you need to verify UI behavior across pages
  • Before shipping — confirm layouts, forms, interactions actually work
  • When reviewing PRs that touch frontend code
  • Accessibility audits and responsive testing

How It Works

Uses the browser automation MCP (claude-in-chrome, Playwright, or Puppeteer) to interact with live pages like a real user.

### Phase 1: Smoke Test ``` 1. Navigate to target URL 2. Check for console errors (filter noise: analytics, third-party) 3. Verify no 4xx/5xx in network requests 4. Screenshot above-the-fold on desktop + mobile viewport 5. Check Core Web Vitals: LCP < 2.5s, CLS < 0.1, INP < 200ms ```

### Phase 2: Interaction Test ``` 1. Click every nav link — verify no dead links 2. Submit forms with valid data — verify success state 3. Submit forms with invalid data — verify error state 4. Test auth flow: login → protected page → logout 5. Test critical user journeys (checkout, onboarding, search) ```

### Phase 3: Visual Regression ``` 1. Screenshot key pages at 3 breakpoints (375px, 768px, 1440px) 2. Compare against baseline screenshots (if stored) 3. Flag layout shifts > 5px, missing elements, overflow 4. Check dark mode if applicable ```

### Phase 4: Accessibility ``` 1. Run axe-core or equivalent on each page 2. Flag WCAG AA violations (contrast, labels, focus order) 3. Verify keyboard navigation works end-to-end 4. Check screen reader landmarks ```

Output Format

```markdown ## QA Report — [URL] — [timestamp]

### Smoke Test - Console errors: 0 critical, 2 warnings (analytics noise) - Network: all 200/304, no failures - Core Web Vitals: LCP 1.2s ✓, CLS 0.02 ✓, INP 89ms ✓

### Interactions - [✓] Nav links: 12/12 working - [✗] Contact form: missing error state for invalid email - [✓] Auth flow: login/logout working

### Visual - [✗] Hero section overflows on 375px viewport - [✓] Dark mode: all pages consistent

### Accessibility - 2 AA violations: missing alt text on hero image, low contrast on footer links

### Verdict: SHIP WITH FIXES (2 issues, 0 blockers) ```

Integration

Works with any browser MCP: - `mChild__claude-in-chrome__*` tools (preferred — uses your actual Chrome) - Playwright via `mcp__browserbase__*` - Direct Puppeteer scripts

Pair with `/canary-watch` for post-deploy monitoring.