I would check and see if your firewall can tone down its aggressiveness somewhere in the setting or consider trying a different firewall.
One of the given reasons is that if there are any issues with the new version, you can easily go back to the old one.
That will probably make sense. I mean usually I'd argue that there shouldn't be any need to downgrade so frequently that one would need a special feature for it. But I guess browser developers will sometimes need to release updates very quickly.
But still other browser architectures manage without such a naming.