The Modern Browser Testing Stack: AI, CI, Human Review, and the Cost of Maintenance

Short summary

Browser testing has grown far beyond simple page interactions—modern tests must handle MFA, streaming AI responses, canary deployments, and cross-OS differences. The real challenge is building a testing system that stays understandable and affordable at scale, with metrics like first-attempt pass rate revealing hidden instability. Authentication flows, preview deployments, and environment differences all require systematic approaches rather than ad-hoc fixes.

• •Modern browser testing surface area includes MFA, AI content, streaming, and cross-OS differences
• •First-attempt pass rate is a better reliability metric than final pipeline pass rate
• •Authentication should be modeled as a state machine, not a linear script

Generated with AI, which can make mistakes.