Examine source code of Gently Plasma

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Gently",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(5, 14, 21)",
      "toolbar_text": "rgb(178, 178, 178)",
      "frame": "rgb(5, 14, 21)",
      "tab_background_text": "rgb(178, 178, 178)",
      "toolbar_field": "rgb(5, 14, 21)",
      "toolbar_field_text": "rgb(178, 178, 178)",
      "tab_line": "rgb(5, 14, 21)",
      "popup": "rgb(5, 14, 21)",
      "popup_text": "rgb(178, 178, 178)",
      "icons": "rgb(178, 178, 178)",
      "ntp_background": "rgb(5, 14, 21)",
      "ntp_text": "rgb(178, 178, 178)",
      "tab_loading": "rgb(178, 178, 178)",
      "tab_selected": "rgb(1, 38, 71)",
      "toolbar_field_border_focus": "rgb(1, 38, 71)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{32db199c-e556-4776-bb4c-b6d0f0e72893}"
    }
  }
}