css.properties.perspective - Firefox versions are not in chronological order

[MegaScience]

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?

For Firefox under Desktop and Mobile, the versions are out-of-order. It goes from Firefox 10 (Release date: ⁨2012-01-31⁩) to Firefox 49 (Release date: ⁨2016-09-20⁩) to Firefox 16 (Release date: ⁨2012-10-09⁩). I was checking for the recent 147 change involving -webkit-perspective and the odd ordering confused me.

What browsers does this problem apply to, if applicable?

No response

What did you expect to see?

1. Firefox 10 (Release date: ⁨2012-01-31⁩)
2. Firefox 16 (Release date: ⁨2012-10-09⁩)
3. Firefox 49 (Release date: ⁨2016-09-20⁩)
4. Firefox 147 (Release date: ⁨2026-01-13) (Or the note attached to Firefox 49 as it is currently)

Did you test this? If so, how?

By looking at the table and seeing that a much later version was placed between two older ones.

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

No response

Do you have anything more you want to share?

If this order is intentional by putting "Full support" at the bottom every time, it'd still be contradictory for a part above to admit support wasn't as comprehensive before Firefox 147.

MDN URL

https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/perspective

MDN metadata

MDN page report details

• Query: css.properties.perspective
• Report started: 2026-01-14T04:49:41.170Z

[caugner]

Thanks for reporting.

This is a presentational issue, as the perspective property has three parallel support branches:

• unprefixed
• prefixed with -webkit-
• prefixed with -moz-

I think a good solution would be to have separate timelines for these instead of a single one.