Firefox (88.0 64bit up-to-date) on a company managed Win10 machine.
WebZ is not keeping information across Sessions, including Login.
This means every time a new tab is opened (even without Restart of the browser, even when WebZ is already opened and logged-in in another tab) WebZ would need a new login (both for Phone-Number and QR-code based - 2FA is enabled for my account), even when "Keep my signed in" is checked.
Also changing the background image is not persisted and resets back to the default. I haven't tried other changes yet.
Steps to reproduce
Open webz.telegram.org with Firefox/Win10
Log in, do check "keep me signed in"
optionally change the background image
Optionally close the tab.
Optionally close the browser.
Open webz.telegram.org again -> login is gone, need to login again
Log in -> background image is back to default
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