Examine source code of Dark Fenix

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Dark Fenix",
  "author": "Andrei Cristian Petcu",
  "description": "This is a dark theme inspired by the new Firefox for Android release (Fenix). Edit theme here color.firefox.com/?theme=XQAAAAKkBAAAAAAAAABBqYhm849SCicxcUhA3DJozHnOMuotJJGTSDJb-FUjf7Mw2VAVHezV_xv79JishuaMAlQs41MN24hV_0CG0VmlorOZhd96gWR3F52l7wx3zlkkdyKtrV34f6wGULgSWdHC8dq_XnKJhCixY6f5K77vDAt15lzXfOCG_KZgcdaGoCN7cEoS_IuVJQU6T09gz-xPq9pW-R80KZ3azEAoqfHKFfYpPFlV-8vYnI55BnIW_wWzfa7qk2w0wviSVDImmpjongvVsQSSAnEePFWkQrSIphADwHI3qT48BQNuy4otWyOhePb-rlVJ4Cj8HMj7oe_N-vCHyic_HIu_e6Ows-I4LAdcz8q3SrDqB00BL70mRigaSfKDFnPIEWdS7EUzoZnth8J1zguwbSNqI1nwc41zfBv9M_JYnY0t3U3dnQGgmrpktjsXAlf8J3JQleD88dFQB8vrWE95MHJW7buft0Hs7dHkiETeGr2WmhqFS5nWu6qlO_Sbknk5Wcqo5M1L2B22Sn5T03WppNugHKDMxpkA42uYxGFDLcFGz10phYOdKQ4FVff8G1oagR0GP5REnHr_yj4aoA",
  "homepage_url": "https://github.com/andreicristianpetcu/firefox_themes",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "theme": {
    "colors": {
      "bookmark_text": "rgb(251, 251, 254)",
      "button_background_active": "rgb(53, 53, 62)",
      "button_background_hover": "rgb(53, 53, 62)",
      "frame_inactive": "rgb(33, 33, 39)",
      "frame": "rgb(33, 33, 39)",
      "icons_attention": "rgb(251, 251, 254)",
      "icons": "rgb(251, 251, 254)",
      "ntp_background": "rgb(33, 33, 39)",
      "ntp_text": "rgb(251, 251, 254)",
      "popup_border": "rgb(33, 33, 39)",
      "popup_highlight_text": "rgb(0, 179, 244)",
      "popup_highlight": "rgba(255, 255, 255, 0.1)",
      "popup_text": "rgb(251, 251, 254)",
      "popup": "rgb(33, 33, 39)",
      "sidebar_border": "rgb(33, 33, 39)",
      "sidebar_highlight_text": "rgba(255, 255, 255, 0.6)",
      "sidebar_highlight": "rgb(53, 53, 62)",
      "sidebar_text": "rgba(255, 255, 255, 0.4)",
      "sidebar": "rgb(33, 33, 39)",
      "tab_background_separator": "rgb(33, 33, 39)",
      "tab_background_text": "rgb(169, 169, 171)",
      "tab_line": "rgb(251, 251, 254)",
      "tab_loading": "rgb(251, 251, 254)",
      "tab_selected": "rgb(33, 33, 39)",
      "tab_text": "rgb(251, 251, 254)",
      "toolbar_bottom_separator": "rgb(33, 33, 39)",
      "toolbar_field_border_focus": "rgb(33, 33, 39)",
      "toolbar_field_border": "rgb(33, 33, 39)",
      "toolbar_field_focus": "rgb(53, 53, 62)",
      "toolbar_field_highlight_text": "rgb(0, 179, 244)",
      "toolbar_field_highlight": "rgb(33, 33, 39)",
      "toolbar_field_separator": "rgba(255, 255, 255, 0)",
      "toolbar_field_text_focus": "rgba(255, 255, 255, 0.6)",
      "toolbar_field_text": "rgb(251, 251, 254)",
      "toolbar_field": "rgb(33, 33, 39)",
      "toolbar_top_separator": "rgba(255, 255, 255, 0.2)",
      "toolbar_vertical_separator": "rgb(33, 33, 39)",
      "toolbar": "rgb(33, 33, 39)"
    }
  }
}