From this detailed guide, you can learn how to install ManeFlix Addon On Your Kodi.
ManeFlix is a New Free Movies & TV Shows Kodi Addon.
How To Install ManeFlix Kodi Addon
- 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://tommhe14.github.io
- Click OK
- Click back on your remote/keyboard
- Click Add-ons
- Click Install from Zip File
- Click tommhe14
- Click plugin.video.maneflix.x.x.zip.
- Wait for Add-On Enabled Notification
- Wait till you can see the message Add-on installed pops up.
That's it! You can now find you addon from main menu > Add-ons, enjoy.