Examine source code of MacOS Mojave

{
  "manifest_version": 2,

  "applications": {
    "gecko": {
      
    }
  },

  "name": "MacOS Mojave",
  "description": "A theme MacOS Mojave",
  "author": "Olario",
  "version": "1.1",

  "icons": {"32": "icon.svg"},

  "theme": {

  },

  "dark_theme": {
  	"images": {
  		"theme_frame": "mojave.jpg"
  	},
    "colors": {
      "tab_background_text": "rgb(249, 249, 250)",
      "icons": "rgba(250, 250, 250, 50)",
    //"frame": "hsl(240, 15%, 15%)",
      "popup": "#4a4a4f",
      "popup_text": "rgb(249, 249, 250)",
      "popup_border": "#27272b",
      "tab_line": "#ffffff",
      "toolbar": "rgba(64, 64, 64, 0)",
      "toolbar_bottom_separator": "hsl(240, 5%, 5%)",
      "toolbar_field": "rgba(71, 71, 73, 0)",
      "toolbar_field_border": "rgba(249, 249, 250, 0.2)",
      "toolbar_field_separator": "#5F6670",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "ntp_background": "#2A2A2E",
      "ntp_text": "rgb(249, 249, 250)",
      "sidebar": "#38383D",
      "sidebar_text": "rgb(249, 249, 250)",
      "sidebar_border": "rgba(255, 255, 255, 0.1)"
    }
  }
}