javascript.builtins.FinalizationRegistry.register - Non-registered symbol as target supported in Firefox 144

[mvduin]

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 "Non-registered symbol as target" feature for FinalizationRegistry.register is listed as not supported in Firefox.

What browsers does this problem apply to, if applicable?

Firefox

What did you expect to see?

Supported in Firefox 144

Did you test this? If so, how?

I did not test it, I trust the linked bug report which indicates it has been fixed.

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

https://bugzilla.mozilla.org/show_bug.cgi?id=1863140

Do you have anything more you want to share?

No response

MDN URL

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/FinalizationRegistry/register

MDN metadata

MDN page report details

• Query: javascript.builtins.FinalizationRegistry.register
• Report started: 2025-11-24T18:57:05.686Z