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Core Web Vitals in Firefox

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  • Seneste svar af cor-el

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Dear Firefox Team, good morning.

I hope you are doing well and that you are all healthy.

Guys... while looking for a way to measure the performance of our site, we came across the Core Web Vitals (CWV) some time ago. These are Google KPIs for measuring the user experience on a page (https://web.dev/vitals/#core-web-vitals). Unfortunately, some of the KPIs (like the Largest Contentful Paint or Cumulative Layout Shift) are currently only accessible using Chrome and it's preformance API. That's a pity, because there are also many people using Firefox who visit our site... and it would be interesting to have such KPIs as well.

In an article by Cloudflare (https://developers.cloudflare.com/analytics/web-analytics/understanding-web-analytics/core-web-vitals/) we recently learned that Firefox is also planning to expose the metrics used in the CWV... only the "coming soon" from the article is a bit vague. That's why I'm contacting you to get some more information on that topic. Do you perhaps know whether the topic is planned and will be tackled this year?

Thank you for your attention. Best regards, Carlos

Dear Firefox Team, good morning. I hope you are doing well and that you are all healthy. Guys... while looking for a way to measure the performance of our site, we came across the Core Web Vitals (CWV) some time ago. These are Google KPIs for measuring the user experience on a page (https://web.dev/vitals/#core-web-vitals). Unfortunately, some of the KPIs (like the Largest Contentful Paint or Cumulative Layout Shift) are currently only accessible using Chrome and it's preformance API. That's a pity, because there are also many people using Firefox who visit our site... and it would be interesting to have such KPIs as well. In an article by Cloudflare (https://developers.cloudflare.com/analytics/web-analytics/understanding-web-analytics/core-web-vitals/) we recently learned that Firefox is also planning to expose the metrics used in the CWV... only the "coming soon" from the article is a bit vague. That's why I'm contacting you to get some more information on that topic. Do you perhaps know whether the topic is planned and will be tackled this year? Thank you for your attention. Best regards, Carlos

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I can find this on Bugzila, but it hasn't started yet.

  • 1722325 - [meta] Cumulative Layout Shift (CLS) implementation
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This is for End User help questions. Those should be directed to the Developer forum site.

https://support.mozilla.org/en-US/kb/file-bug-report-or-feature-request-mozilla

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I can find this on Bugzila, but it hasn't started yet.

  • 1722325 - [meta] Cumulative Layout Shift (CLS) implementation
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And here we have some info on LCP, also from Bugzilla:

  • 1722322 - [meta] Largest Contentful Paint (LCP) implementation

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