Comment 93 for bug 10910

The problem could be deeper than forgetting the settings. This may be a clue. Even when the setting is changed to A4, it prints on A4 paper, but the format is still letter. (Is this another bug, or part of this bug?) Look closely and you will see that Firefox doesn't print to the bottom of A4 paper. It looks like it simply prints letter layout on A4 paper.

Is it possible that some coder years ago thought the whole world was letter and hard-coded it deep in a line somewhere, such that all subsequent attempts to do otherwise are defeated? (BTW, there are only three countries in the world still sticking to the old imperial units, Myanmar (Burma), Liberia and one other country between Mexico and Canada. The rest are already metric or changing.)