My config: Brave 1.77.101 with Chrome 135.0.7049.115, Windows 10 Home x64 22H2
I can configure an extension to run in a private window. I cannot configure it to run in a private Tor window. For example, I have to use the Tabs to Front v2 add-on since Brave does not have an option to change focus to a newly opened tab. This extension is configured to run in normal and private windows, and it works there. However, when I open a new private Tor window, the add-on does not run, so new tabs open in the background instead of getting focus.
The new-tab-to-front option has been requested for years, but a preference setting never got added. Can extensions be allowed to load when using the Tor feature in Brave?