Helix Font Fallback

Name: Helix Font Fallback
Author: Adobe Inc.

Helix Font Fallback computes the fallback fonts for all the fonts loaded on the page. This is helpful to prevent CLS (Web Vitals).

As of June 2026, Helix Font Fallback has 341 users in the Developer Tools category.

Adobe Inc.Developer Tools★ Featured

Chrome Web Store ↗.crx

Users+11.1%

341

Rating0%

—

— reviews

Reviews0%

—

Version

1.2.0

Manifest V3

History

4 snapshots

Tracking since Apr 20, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 20, 2026	307	—	—	1.2.0
May 5, 2026	311	—	—	1.2.0
May 15, 2026	330	—	—	1.2.0
May 28, 2026	322	—	—	1.2.0
Now	341	—	—	1.2.0

Permissions & access

Permissions: scripting
Host access: *://*/

Screenshots

About

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