Ok, I think I found the post I was remembering, and it seemed to me like understandable frustration at bad software decisions: https://support.mozilla.org/en-U

Ok, I think I found the post I was remembering, and it seemed to me like understandable frustration at bad software decisions: https://support.mozilla.org/en-US/questions/1269361#answer-1263842 https://support.mozilla.org/en-US/questions/1269361#answer-1... Note that the css hack discussed in the thread helps by controlling some of the sizes, but not enough of them. You end up with a mishmash on the screen. Hmm, this one further in the thread is more of a rant: https://support.mozilla.org/en-US/questions/1269361?page=2#answer-1281821 https://support.mozilla.org/en-US/questions/1269361?page=2#a... There are a few other responses to the original comment, and one of the mods deleted some naughty words from the rant, leading to this comment: https://support.mozilla.org/en-US/questions/1269361?page=2#answer-1281966 https://support.mozilla.org/en-US/questions/1269361?page=2#a... This one puts the blame where it belongs: https://support.mozilla.org/en-US/questions/1269361?page=3#answer-1282041 https://support.mozilla.org/en-US/questions/1269361?page=3#a... Finally, this sums up the wider situation: https://support.mozilla.org/en-US/questions/1269361?page=3#answer-1290278 https://support.mozilla.org/en-US/questions/1269361?page=3#a... : "Unfortunately, this is typical with Mozilla: every "upgrade" is a downgrade in some important aspect of the program." That rings true for Firefox as well. Ok, I'll stop pasting links from that thread here but I found it to be worth scrolling through, to see the user frustration that Mozilla derps around so much with advanced features without managing to get something as basic as font sizes working properly. I can use Thunderbird with just some annoyance here and there, but for my mom (her vision isn't so good any more), Thunderbird is unusable and there seems to be no sane way to fix it. (One of the suggestions was to fork the source code: thanks a lot).