Examine source code of Prolific Management 1.2

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Prolific Management 1.2",
  "manifest_version": 2,
  "description": "Prolific Management Firefox Theme 1.2 has just a couple of variations from the original theme. Added some more lightning and cloud effects."
}