Turned my PC off this morning . Started it shortly after and Firefox updated to the latest version. After the update I found that Google, Facebook and may other websites are showing a strange narrow font with the horizontal parts of E F etc missing and it's all in capitals. Checked for viruses and malware and PC clean. Running Windows 10 64bit. I have Times New Roman as my selected font (tools - options - content) but, regardless it still shows this odd font regardless of what font I set it to and won't change. I installed Opera and that's showing things correctly.