Is it possible to somehow use webRequestBlocking in unpacked extensions since manifest v3?

Question

JavaScript

When adding webRequestBlocking to manifest v3, the extension fails to load and gives the following error:
'webRequestBlocking' requires manifest version of 2 or lower.

And if you do not add webRequestBlocking to permissions (but still add declarativeNetRequest), then the extension is loaded, but this error occurs during loading:
You do not have permission to use blocking webRequest listeners. Be sure to declare the webRequestBlocking permission in your manifest.

What is the right way to create extensions with blocking and redirection functionality now? And most importantly, how to test them when they are unpacked?