why would my firefox browser not work with United Airline site
I'm using a Macbook Air running High Sierra v. 10.13.6 with a Firefox browser 102.0.64 version. When I try to search for flights on the United Airlines web site, I get a message saying that I'm not authorized to access the web page. I think it may be a setting in my Firefox Preferences, but have not been able to fix it yet. Anyone have any ideas? Thanks.
MacBook Air 11″, macOS 10.13