This is usually when the result contains UTF-8 characters or Latin-1 characters when JSON is not expecting them. I've tried to escape/encode them in the recent versions of WWW::Mechanize::Firefox. From looking at your code, it seems you're using a very early version of the module when it was still named ::FireFox. Consider upgrading to the latest release which should handle weird encodings far better.

In reply to Re: mozrepl invalid characters by Corion
in thread mozrepl invalid characters by jkanko

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