CSP Mistakes That Slow Web Fonts and How to Fix Them
Web fonts are one of those things teams barely think about until the site starts flashing invisible text, Lighthouse complains, or CSP suddenly blocks production traffic. I’ve seen this happen a lot: someone tightens Content Security Policy, feels good about shipping a safer header, and then fonts start failing in subtle ways. Not always completely broken. Sometimes they just get slower. And slow fonts are nasty because they hurt rendering, CLS, and perceived quality without looking like an obvious outage. ...