Win10 and Firefox (89, and 90 does not correct it) is only running an older no-longer-existing version of my javascript file (from the html web file). It does not access the new edited javascript file with same file name. Sounds impossible, but I have edited the javascript file (including added an alert to change the modified date again), but Both the debugger and the regular direct URL continue to run the older script file (the new alert does not trigger, and the older code is directly visible in debugger, which does not match new file that exists). Firefox will not access the new edited javascript file. It always worked fine until this week, but not now. This old file that runs does not exist on my computer, except obviously in some Firefox cache. I have cleared cache, and disabled Cache in the Firefox Network tab, with no effect. It is a shutdown situation now. To continue using Firefox, how can I bypass this bug to be able to access and use the edited Javascript file? I've used Firefox and Javascript a few years, and never saw this before.