Also, could you use EBCDIC? It takes alot of processing power to convert your very long message from ASCII to EBDCDIC.
I don't use evil proprietary formats like EBCDIC.
EBCDIC is not a propietary format.
(c) The situation is not even like in (b), because not all free browsers are supported, only a particular one.
You are free to modify the supported browser into something that fits your needs, so that your favourite browser works with the commenting process. Would you like to do that?
(d) And even this one, in some forms, is not really free as MJR has reminded us. (According to RMS in http://www.ofb.biz/modules.php?name=News&file=print&sid=353, "To use Firefox as free software, you have to build it yourself from the source code."
What he means is that the binaries as distributed by Mozilla are not-free (they include a non-free bug reporting tool). Ututo-e for example contains a Firefox, you don't need to compile that your self.
Cheers