Negative

Unsupported and Negative Tests

feature detectionnegative paths

Feature detection

Negative tests matter because missing or stripped APIs should fail in recognizable ways, not silently or inconsistently.

Runtime
Origin
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Secure context
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Protocol
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Host
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Clipboard API
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FedCM RP origin
https://canary.polarbrowser.com
FedCM IdP origin
https://canary-idp.polarbrowser.com
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