I've been using Firefox Developer version for some time now on Mac OS and have never had a problem like this before. However, since version 80, Firefox Developer fails to render the new css after a change and save has been made to the style sheet even after multiple browser refreshes. Caching on the server end has been disabled so I'm really trying to find a solution to this issue as it has forced me to find alternative browsers to develop with like Safari since Firefox Developer has become unusable for me. I've gone through and performed manual cache flushes on the browser from the settings/preferences panel. On occasion, by quitting Firefox Developer edition and relaunching it will then render the new changes but only after a quit and relaunch and sometimes using a private window as well. This is happening with multiple hosting services so it's not any particular provider. This is most annoying. I've even reset Firefox Developer a number of times to default settings without any extensions etc. and still the problem exists. Earlier version of Firefox Developer don't seem to be exhibiting this problem. I'm not running any proxy's or special configurations with the settings either. Any assistance to finding a workaround would be greatly appreciated or I'm going to have to stop using Firefox Developer version altogether. Thank you,