Followed this with the intention of using a proxy addon (torbrowser → proxy → website), but it does not work, there is no connection to the internet when the proxy addon is enabled, so the instructions do not have any effect.
The instructions appear to be out of date because they reference this file “/etc/uwt.d/50_user.conf” and this file “/etc/torbrowser.d/50_user.conf” but neither file exists in whonix.
The titles for each section " Remove proxy settings for [Tor Browser Downloader by Whonix] and [Remove proxy settings for APT repository files] imply that this section is not about allowing tor → proxy, but about removing the software updates ability to update over tor, which isnt related to anything in this section of the website.
edit: I re-read the initial disclaimer about TB not having any known solution for that method, so i went to the next method Connecting to Tor before a Proxy using Proxyfier Method - Whonix
There is currently no tested, known to work solution for using Tor Browser with the Proxyfier Method. … Alternatively try the Proxy Settings Method.
Ok, so theres no solution for first method, and no solution for the second method, but it suggests to try the first method, and then goes on (in the 2nd method) explaining how to configure TB with it. Thats very confusing.