Works for me: > c = console Console { } > window.console = {} Object { } > c.log("hello") undefined "hello" If you could provide

Works for me: > c = console Console { } > window.console = {} Object { } > c.log("hello") undefined "hello" If you could provide specific steps-to-reproduce and/or a test case, then dropping those in a bug is the best way to get the behavior fixed: https://bugzilla.mozilla.org/enter_bug.cgi?product=Firefox&component=Developer%20Tools%3A%20Console https://bugzilla.mozilla.org/enter_bug.cgi?product=Firefox&c...