Examine source code of Borealis Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "author": "Alexander Eckert",
  "homepage_url": "https://eckertalex.dev/",
  "name": "Borealis Theme",
  "short_name": "Borealis",
  "description": "Firefox theme inspired by the calm colors of the aurora borealis in Alaska.",
  "theme": {
    "colors": {
      "button_background_active": [
        2,
        135,
        123
      ],
      "button_background_hover": [
        2,
        135,
        123
      ],
      "icons": [
        255,
        222,
        17
      ],
      "icons_attention": [
        255,
        157,
        0
      ],
      "frame": [
        18,
        56,
        54
      ],
      "frame_inactive": [
        25,
        73,
        69
      ],
      "ntp_background": [
        25,
        73,
        69
      ],
      "ntp_text": [
        255,
        255,
        255
      ],
      "popup": [
        18,
        56,
        54
      ],
      "popup_border": [
        21,
        45,
        43
      ],
      "popup_highlight": [
        25,
        73,
        69
      ],
      "popup_highlight_text": [
        255,
        255,
        255
      ],
      "popup_text": [
        255,
        255,
        255
      ],
      "sidebar": [
        18,
        56,
        54
      ],
      "sidebar_border": [
        21,
        45,
        43
      ],
      "sidebar_highlight": [
        25,
        73,
        69
      ],
      "sidebar_highlight_text": [
        255,
        255,
        255
      ],
      "sidebar_text": [
        255,
        255,
        255
      ],
      "tab_background_separator": [
        21,
        45,
        43
      ],
      "tab_background_text": [
        170,
        170,
        170
      ],
      "tab_line": [
        255,
        222,
        17
      ],
      "tab_loading": [
        255,
        222,
        17
      ],
      "tab_selected": [
        25,
        73,
        69
      ],
      "tab_text": [
        255,
        255,
        255
      ],
      "toolbar": [
        25,
        73,
        69
      ],
      "toolbar_bottom_separator": [
        21,
        45,
        43
      ],
      "toolbar_field": [
        31,
        98,
        93
      ],
      "toolbar_field_border": [
        35,
        109,
        103
      ],
      "toolbar_field_border_focus": [
        0,
        162,
        164
      ],
      "toolbar_field_focus": [
        31,
        98,
        93
      ],
      "toolbar_field_highlight": [
        35,
        109,
        103
      ],
      "toolbar_field_highlight_text": [
        255,
        255,
        255
      ],
      "toolbar_field_separator": [
        35,
        109,
        103
      ],
      "toolbar_field_text": [
        255,
        255,
        255
      ],
      "toolbar_field_text_focus": [
        255,
        255,
        255
      ],
      "bookmark_text": [
        255,
        222,
        17
      ],
      "toolbar_text": [
        255,
        222,
        17
      ],
      "toolbar_top_separator": [
        21,
        45,
        43
      ],
      "toolbar_vertical_separator": [
        21,
        45,
        43
      ]
    }
  }
}