Firefox thinks every crate on Crates.io is infected?! False positive, I bet?

⚓ Rust    📅 2026-06-30    👤 surdeus    👁️ 3      

surdeus

If I download what seems like any crate, for instance https://static.crates.io/crates/serde/serde-1.0.228.crate which I think is a pretty widely used crate, Firefox (140.12.0esr, Debian 13) says "This file contains a virus or malware." It seems 100% sure about it, it doesn't include any softening wording or anything.

Chrome allows the same downloads with no objection.

Firefox used to allow them until a couple days ago.

Is Crates compromised, or is Firefox broken?

I already vibe coded one entire replacement crate because of this; I figured it was a virus.

VirusTotal thinks it is clean: VirusTotal

But now I think it might be a browser bug, because it says EVERY crate is a virus. What's going on?

Assuming it's bogus, maybe someone knows how to report it to Mozilla?

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