Step 1 :Login profile (turn off 2fa). Use this link to go to the section to change Email information. (https://accountscenter.facebook.com/personal_info)
Browser 1 : Add a new email to your facebook profile. request another email that is not registered on facebook
Browser 2 :Open a new browser to log in to the second email and enter the Email confirmation code
Step2 : ctrl + shift + del (clear cache) browser 1 .
Go to the browser 2 and click forgot password
Enter your 2nd Email to receive the code
Enter the password you want to change. (Save) so you can change the password successfully
Please make sure to follow the steps correctly. Doing the steps wrong can damage your account.