proxy auth in mv3

[Marek Király]

Hi, i would like to know, how to setup a proxy extension, that supports proxies with authentification required. Is there a way to do it in mv3 ? I found a webRequest api solution https://developer.chrome.com/docs/extensions/reference/webRequest/#event-onAuthRequired but if i understood correctly, the webRequest API is deprecated in mv3. 

Is there a way to do it in the never version or this option is only possible in mv2 ? 
Thank you :)