Examine source code of Christmas Theme 2020

{
  "name": "Sandro Linux Christmas Theme",
  "description": "A theme which gives Firefox a Christmas Theme",
  "version": "1.2",
  "manifest_version": 2,
  "icons": {
    "800": "Christmas_Theme.png"
  },
  "theme": {
    "images": {
      "theme_frame": "pattern-1084046_1920.jpg"
    },
    "colors": {
      "frame": "white",
      "tab_background_text": "black",
      "tab_loading": "red",
      "toolbar_field_highlight": "red",
      "toolbar_field": "ff9100",
      "toolbar_field_text": "#ffffff",
      "toolbar_text": "black",
      "tab_line": "red",
      "popup_highlight": "lime",
      "ntp_background": "red",
      "popup_border": "red",
      "popup": "red",
      "popup_highlight_text": "black",
      "popup_text": "black",
      "sidebar_highlight_text": "black",
      "sidebar_highlight": "lime",
      "sidebar_text": "black"
    }
  }
}