I've read some complaints about the font that FF desktop uses on some websites. I'm seeing a very annoying font with some letters thicker (almost bold) and other letters thin. This occurs, for example, on the mozilla.org website and when FF is displaying a PDF. I have "allow pages to choose their own fonts" checked, and I am not using hardware acceleration. I went into the developer console and turned off the Mozilla-supplied font for a support webpage, and it then used something like a Times New Roman, but it was uniform in letter thickness. I have attached screen snips. If I display the same page using Chrome, the font looks great, so I don't know exactly what the problem is, but it's clearly a FF problem. Notice in Chrome that the word "garbled" is in bold, and it does not appear in bold in either of the FF font examples.