When I try to go on Firefox an " Unable to Connect" comes up. If I go on Google Chrome I have no problem. Help

I was using Firefox until November. My computer wet in for repair and I have had this issue since. I would like to use firefox again. For some reason every time I try to use it an "Unable to Connect" message comes up.
I have been using Google Chrome to get through school but would perfer Firefox. Please help.

See [[Firefox cannot load websites but other programs can]], a common cause is a firewall blocking Firefox.

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