The script generates a unique avatar for each user by their nickname, so it will always be the same.
Download Tampermonkey
After installing the addon, click on the Tampermonkey icon, click on "Add new script" a window will open in which you have to paste the contents of the Wykop.Avatars.user.js file.
After pasting, do not forget to save the file, you can do this using the shortcut Ctrl+S or File->Save
Or click here to automatically install the script.
