When trying to open
https://www.walmart.com/, both Firefox (v. 68.0.1 in Windows 10, v. 17763.652) and Windows Edge (Microsoft Edge 44.17763.1.0) display the message "Walmart can’t use this browser", with suggestions to try Firefox, Chrome, etc. All browsers were connected through the ISP without proxy or VPN.
N.B. Retried in Edge, **going through a search engine (Start Page), which created the long URL, below, with the referrer tacked into the URL:
This opened Walmart's website correctly, both in Edge and in Firefox. Apparently, Walmart would not open the first time without a referrer. Now that it's dropped cookies in the browser, it reopens with or without referrer. Go figure!
Firefox was restarted in Safe mode, and with all extensions disabled. All browsing data was deleted, including cache and cookies, with no better result. The Chameleon extension was installed, and set to emulate other browsers Walmart recommends, with the same issue.
On starting Firefox's Network Monitor (CtrlShiftE) and reloading, the following was shown:
However, the TOR Browser works well on that site, with connection through their anonymizing onion router (no VPN, though).
Is it a security setting or some other issue causing both Firefox and Edge to fail to open Walmart's site?