I'm also able to replicate this over http://192.168.2.106:8080/a.html Out of interest :ckerschb why are we whitelisting local files?
Bug 1548385 Comment 5 Edit History
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I'm also able to replicate what :ckerschb reports for http://192.168.2.106:8080/a.html as it behaves like a normal server. Out of interest :ckerschb why are we whitelisting local files?