+++ This bug was initially created as a clone of Bug #1851928 +++

crypto.subtle.deriveKey still doesn't support that many derived key algorithms right now. In particular, it doesn't seem to support PBKDF2.

Unless I'm misunderstanding, it seems like Firefox does support PBKDF2. I wrote a test for the mdn-bcd-collector project (https://mdn-bcd-collector.gooborg.com/tests/api/SubtleCrypto/deriveKey/derivedKeyAlgorithm_option_pbkdf2), and it's reporting that support was introduced in Firefox 119. Note that I wrote this test with minimal knowledge of the Web Crpyto API, so please let me know if this test code is incorrect!