Charming Firefox theme (tabs on bottom)

Inspired by Charming theme for Windows 8/8.1. It's a mix of some styles from userstyles.org:Modern Square Tabs for Firefox Australis Grey Colorize Firefox Buttons, Firefox Loading Progress Orange/Gray remade by me. Big thanks are going to ChoGGi for his help.

How to install?
Stylish addon is required. Create new script in Stylish and paste there content of .txt file and save script.