It appears that Firefox doesn’t understand the ISO-8859-15 charset when it’s related to a « plain/text ». So you need to change the charset to ISO-8859-1 to make sure that Firefox will show the special characters for your document.
It appears that Firefox doesn’t understand the ISO-8859-15 charset when it’s related to a « plain/text ». So you need to change the charset to ISO-8859-1 to make sure that Firefox will show the special characters for your document.