I want to make my personal website a PWA. You can find it at francoscarpa.com. To make it a PWA I implemented a service worker on it. I can’t understand why, running an audit with Chrome’s Lighthouse, I get this error: “Something went wrong with recording the trace over your page load. Please run Lighthouse again. (NO_FMP)”.
In particular, I get this error on the "Performance" and "Progressive Web App" tabs. Specifically, they shows under:
- First Meaningful Paint;
- First CPU Idle;
- Time to Interactive.
Moreover, Lighthouse suggests me to:
- Defer offscreen images;
- Avoid multiple page redirects;
- Ensure text remains visible during webfont load.
The fun fact is that I don’t use images on the page I run the test (the homepage, /). I can’t figure out what causes the NO_FMP error. Here’s an image from the audit results:
The errors happen 90% of the time I run a new audit. I guess that, if you run an audit on my website from your machine, you get the same results. If not, try to run more than one audit. I don’t understand under which circumstances I get there errors.