If Mozilla gets a "PARSER:Internal Syntax Error" the error should be shown to the user otherwise it will look like the mail mozilla failed to read is empty. optional this could be done via a pref that defaulted to false. some kind of: user_pref("mail.show_imap_errors", true);
Why make it a pref? "Mozilla encountered a parser error while trying to display this message" would make more sense than pretending the message is blank. (Is that the HTML parser or another parser?)
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