css.properties.letter-spacing - `<percentage>` not supported until Chrome 145

[letynsoft]

What type of issue is this?

Incorrect support data (example: BrowserX says "86" but support was added in "40")

What information was incorrect, unhelpful, or incomplete?

The percentage option is not available/working in chrome/chromium until version 145. The change in chromium also affects the word-spacing property, which in MDN has the option clearly marked as 'will be done', but letter-spacing doesn't.

What browsers does this problem apply to, if applicable?

Chromium (Chrome, Edge 79+, Opera, Samsung Internet)

What did you expect to see?

Extra space compared to not-setting this CSS property.

Did you test this? If so, how?

Yes, apply letter-spacing: 35% to a content, and then observe in chrome compared to firefox.

Can you link to any release notes, bugs, pull requests, or MDN pages related to this?

Chrome status page: https://chromestatus.com/feature/5106867491700736

Do you have anything more you want to share?

The following screenshots have the letter-spacing property set on the button with orange letters.

(chrome)

(firefox)

MDN URL

https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/letter-spacing#browser_compatibility
https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/word-spacing#browser_compatibility

MDN metadata

MDN page report details

• Query: css.properties.letter-spacing
• Report started: 2026-02-05T08:59:17.073Z

[github-actions]

This issue was automatically closed because the title was left as the default, and a summary was not added.

If this is not a spam issue, please replace the <SUMMARIZE THE PROBLEM> part of the title with a short summary of the reported issue, and then post a follow-up comment. A maintainer will review your issue and reopen it if needed.

[caugner]

@letynsoft Thanks for reporting. Always make sure to replace <SUMMARIZE THE PROBLEM> to ensure your issue isn't closed. We receive lots of spam issues.