community/firefox: seccomp sandbox violation

It seems that the latest musl update results in new / other system calls being to implement some function resulting in this happy message greeting me during startup:

Sandbox: seccomp sandbox violation: pid 3469, tid 3469, syscall 16, args 2 21523 140720484156728 0 1 0.

Using

export MOZ_DISABLE_CONTENT_SANDBOX=1

disabled the sandbox and prevents the crash, but that seems not to be a sensible solution on the long term. Does anyone have an idea how to fix?

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