A new version of Firefox, which downloaded automatically, says Firefox is configured to use a proxy server that's refusing connections, even though I had access before the download.

I was using Firefox earlier in the day with no problem. About half an hour ago I tried to get on the Internet using Firefox (as always). When I did, I was greeted with a little dialog box showing that something was downloading. That's happened before.
This time, though, I was greeted by an error page that said Firefox was configured to use a proxy server that's refusing connections.
I'm not on a network. I have a desktop computer that connedts to a wireless modem that I share only with my wife. I didn't change my settings on either. Neither did my wife.
My "Connection Settings" box still says "use system proxy settings." There are no entries in the manual settings boxes.
I want to emphasize that I changed *nothing.*
I need to know, please, how I can set my computer to get back onto the Internet or, failing that, how I can go back to the previous version of Firefox.
Thank you very much.
Bob Murdich

You can find the connection settings in Tools > Options > Advanced : Network : Connection
If you do not need to use a proxy to connect to internet then select "No Proxy"
See "Firefox connection settings":
* [[Firefox cannot load websites but other programs can]]

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A new version of Firefox, which downloaded automatically, says Firefox is configured to use a proxy server that's refusing connections, even though I had access before the download.

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