Duplicate post

First, let's get the obvious out of the way: are you connected to the internet? Check the icon in the corner of your screen to see if your computer detects a strong connection. If you're in Airplane Mode or accidentally turned Wi-Fi off, that's your obvious culprit. Try visiting other sites to see if they work. If some sites work and one doesn't, it probably isn't your internet connection. If you have problems with other sites, you might need to reboot your modem and/or router, as any hiccups there can bring down your entire browsing session. This should go without saying, but check your spelling—if you accidentally visited pmcag.com instead of pcmag.com, you'll run into problems.

Some sites do not load after the last update, sites which I have used before cor-el Oct 2, 2022, 10:33:13 I have an email reply but I do not understand the jargon I am not a comp. buff. I need to have clear instructions Thank you G. Arthur

It would be better to continue in the earlier thread so people can understand the context and work with that information:

https://support.mozilla.org/questions/1391424