You obviously don't know how "the texture reference system" works. It's actually super simple: It literally shows you the texture. It will give you the same result on the brush as it does in the browser.
The only exception is when the %tooltexture parameter is used, which overrides the texture to be used in the browser. Every blend texture uses %tooltexture as you wouldn't be able to tell what it actually blends without putting it on a displacement first.
If this is your first time logging in after the migration (Feb 8, 2022), you must reset your password to log in. Follow this guide if you're having trouble