Examine source code of Dark Forest Green Muted

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Forest Green",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(44, 54, 48)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(26, 36, 30)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(26, 36, 30)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(220, 220, 220, 0)",
      "popup": "rgb(26, 36, 30)",
      "popup_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(64, 74, 68)",
      "toolbar_field_border_focus": "rgb(94, 104, 98)",
      "toolbar_field_focus": "rgb(26, 36, 30)",
      "toolbar_field_highlight": "rgb(64, 74, 68)",
      "tab_loading": "rgba(220, 220, 220, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{13609508-ed50-4671-9e00-d9ed0dfa26e3}"
    }
  }
}