I use Cloudflare's Warp VPN all the time for regular browsing and yet I recently found that Patreon can tell the country I'm physically located in. It baffled me how it could do so; Patreon could tell the country on multiple browsers, across Windows and Android devices as well, all the while I opened it in incognito/private mode, even as I made sure that the public IP was not my ISP provided one. Of course any location-sharing permissions were denied outright.
While looking through browser privacy checkers, I noted time zone information is something that could be read by websites and servers. It wasn't just numerical offset either, it was basically in the Continent/City
format, so any website can easily tell the physical location from it.
Honestly never heard of privacy leakage through this vector before; does anyone know how to outright disable browsers form advertising the local time zone? I see there are some addons to change it, but it seems to be a hassle to always configure it to match your VPN location, and they don't seem applicable to mobile browsers either.
PS Just occurred to me: does anyone know what Tor Browser does to remedy this issue?