@utts It’s actually not that much harder than editing the properties of a Windows shortcut or editing the Registry.
@bravethinker, I played with two methods from that site: one using BareBones’ BBEdit (TextWrangler was discontinued, but BBEdit still can do the XML to binary thing for .plists, apparently), and one using the command line. Editing the .plist directly had no effect, but using the command line did force Brave to open in Incognito/Private mode, and it’s easy even for those who don’t know command line/Terminal.
First, copy these instructions into a text document or something, or maybe use another browser to view this page, because you’ll need to Quit Brave. Then, like the page from the link above directs, go into Finder and do Cmd-Space (you could click the Spotlight magnifying glass in the menu bar, too), type Terminal, and hit return. What you should see before you hit return is this (click image to enlarge):
That should bring up the Terminal window. In there, type:
cd Library/Preferences
then
defaults write com.brave.Browser IncognitoModeAvailability -integer 2
You should have an interaction looking something like this (I did “ls -al” just to show I was in the home directory on opening Terminal):
You can quit Terminal and launch Brave and you should see this:
Ya done!