
Step by step. Simple and easy way.
1. Press F12 key
2. Click at “Console” tab

3. Insert the following command:
webpackJsonp.push([[999],{"l":(m,e,r)=>{for(k in r.c)(m=r.c[k].exports)&&m.default&&m.default.isDeveloper==0&&Object.defineProperty(m.default,"isDeveloper",{get:()=>1})}},[["l"]]]);
4. Now go to your discord settings.

5. Click at “Experiments”

6. Look at Custom Profiles Premium and select “Treatment 1”

7. Go to “My account” tab and done! You can upload your banner image.

More detailed video tutorial:
Click here
zeenkey
El mismísimo ZEENKEY está aquí 😎