Hey, i can't get authentication popup in this case: Server A Server B 1 site on server A My site is using some files from server B, but server B has password protection access like in .htaccess Problem that i don't get popup required to enter log/pass for server B when i load site from server A to get those files loaded on page. If i go directly to server B and open some page from it i see popup. Also i see popup in Chrome or IE when i'm opening site from server A, but not in firefox. I tried to set different config settings in Firefox but no luck.

Firefox 77.0 (64-bit) macOS Catalina 10.15.4