Helix Font Fallback

Helix Font Fallback computes the fallback fonts for all the fonts loaded on the page. This is helpful to prevent CLS (Web Vitals).
What is Helix Font Fallback?
Helix Font Fallback is a Chrome extension that computes fallback fonts for all the fonts loaded on the page. It prevents CLS (Core Web Vitals) by generating CSS for the fallback fonts and allows users to preview them directly in the current page.

Extension stats

Version: 1.1.0 (Last updated: 2022-12-22)
Creation date: 2022-09-08
Risk impact: Moderate risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 3
Permissions:
  • scripting
Host permissions:
  • *://*/
Size: 61.27K

Other platforms

Not available on Firefox
Not available on Edge
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Extension summary

Helix Font Fallback computes the fallback fonts for all the fonts loaded on the page. A fallback font is a font that most of the browsers know already which is sized to approximatively the size of the font it temporarily replaces. Like this, the browser can display nicely the page while the custom font is loaded. This is crucial to prevent CLS (Core Web Vitals).

Key features:

  • computes a fallback font for all fonts loaded on the current page
  • generates some CSS that can be directly copied and pasted in the existing website CSS
  • allows the user to preview the fallback fonts directly in the current page

Extension safety

Risk impact

Helix Font Fallback requires a few sensitive permissions. Exercise caution before installing.

Risk likelihood

Helix Font Fallback has earned a good reputation and can be trusted.

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