From this detailed guide, you can learn how to install Just Scrubs Build On Your Kodi.
One of the best parts about Just Scrubs is that it’s a ‘non-debrid’ build meaning a premium debrid service like Real Debrid or Premiumize is not required to access content.
this installation guide applies to all compatible devices including Amazon Firestick, Fire TV, Android & iOS, Mac, Windows, Android TV, Android Boxes, etc.
How To Install Just Scrubs Kodi Build.
- Open Kodi
- Be sure to have the Unknown Source box checked as Kodi requires this before installing 3rd party add-ons.
- HOME Screen > Add-ons > Settings button 
> Add-ons > Enable Unknown Sources.
- From your Home Click Settings (cog icon top left)
- Click File Manager
- Click None
-Type in the following EXACTLY
https://the666mafia.github.io/repo
- Click OK
- Click back on your remote/keyboard
- Click Add-ons
- Click Install from Zip File
- Click The666mafia
- Click repository.The666mafia.x.x.zip.
- Wait for Add-On Enabled Notification
- Click Install from Repository
- Click The666mafia Repository
- Click Prorgam add-ons
- Click Install
- Wait for Add-On Enabled Notification
- Click Contine
- Click Build Menu
- Click Just Scrubs Build - > Install (Fresh install)
- Click Continue
- The build will now download and install. Once completed select OK to force close Kodi
- Restart Kodi and leave it for a couple of minutes to allow all updates to complete.