I don't know what section to post this in, so I choose this place
What you need:
Firefox
Tamper data
Steps:
Go to Signup.Live.com
Inspect element (Yes I know) @outlook.com to @live.com and put in what you want as long as it's available.
Click start tampering, and click on create account, click submit on the first two pop ups and edit the thirf one and the value should be "outlook.com" change it to "Live.com"
This is very legit and works pls be fair and don't abuse