From 47 to 75 Commits: How a Single _headers File Broke My Brain (and My App) for 8 Hours

Short summary

A developer spent 8 hours debugging a privacy-first PWA with client-side video processing, only to discover the issue was a simple syntax error in Cloudflare Pages' _headers file affecting COOP and COEP security headers. The fix required properly configuring Cross-Origin policies to allow browser-sandboxed web workers to function correctly. Lesson: take breaks earlier in debugging to avoid panic decisions like deleting live infrastructure.

• •8-hour debugging session traced to syntax error in Cloudflare _headers configuration
• •Issue involved Cross-Origin-Opener-Policy and Cross-Origin-Embedder-Policy for ffmpeg.wasm
• •Key lesson: step away from troubleshooting before desperation leads to infrastructure decisions

Generated with AI, which can make mistakes.