Examine source code of Theplayer 2

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Theplayer 2",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(31, 59, 75)",
      "toolbar_text": "rgb(248, 251, 243)",
      "frame": "rgb(11, 31, 38)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(14, 40, 60)",
      "toolbar_field_text": "rgb(255, 255, 243)",
      "tab_line": "rgb(174, 15, 48)",
      "popup": "rgb(29, 62, 71)",
      "popup_text": "rgb(249, 249, 252)",
      "button_background_hover": "rgb(131, 42, 42)",
      "frame_inactive": "rgb(33, 54, 85)",
      "icons_attention": "rgb(55, 103, 128)",
      "icons": "rgb(240, 244, 247)",
      "ntp_background": "rgb(14, 40, 60)",
      "sidebar_border": "rgb(28, 45, 64)",
      "sidebar_highlight": "rgb(37, 69, 91)",
      "tab_loading": "rgb(174, 15, 48)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e6995dad-10e3-466e-a79a-fac0282884be}"
    }
  }
}