Some characters don't display properly.
There are certain websites that, on firefox only, display apostrophes and quotations as Russian letters. For example, on google docs, if I type "He's such a great friend" it will display уHeТs such a great friendФ. When I open the document on the app, it is normal, but I haven't been able to figure out why it does this on my computer. I use Mozilla Firefox for Fedora 149.0.2 for reference.