TorBrowser 12.0.3 (no) proxy setup problems

I like to use an instance of TorBrowser configured for clearnet (so not trough the TOR network) to use it as a everyday browser. I enjoy it much more than other browsers/firefox flavors and have been doing so for years.
(And yes, I know, this is not the intended use for TB and should normally be avoided, but as I said, this is a separate instance, for clear net, because I prefer it to the Firefox et al.)

However the recent version 12.0.3 changed something, and my usual settings don’t work anymore.

Up to this version I ran the browser with TOR_SKIP_LAUNCH=1 TOR_TRANSPROXY=1 variables
and had these configured in about:config

network.proxy.type = 0
network.proxy.socks_remote_dns = false
network.dns.disabled = false
extensions.torlauncher.start_tor = false
extensions.torbutton.test_enabled = false
extensions.torbutton.startup = false

It still worked with the previous version 12.0.2 but does not work with the new one (12.0.3).

Can anyone please help me adjust the configuration so I can continue using 12.0.3 as described?
I’d really appreciate it!

Thank you!