Examine source code of Gruvbox Tweak 1

{
  "manifest_version": 2,
  "name": "Gruvbox Bordered",
  "description": "Gruvbox dark theme tweaked",
  "version": "1.31",
  "theme": {
    "colors": {
      "frame": "#1d2021",
      "frame_inactive": "#282828",
      "toolbar": "#282828",
      "toolbar_top_separator": "#282828",
      "toolbar_vertical_separator": "#a89984",
      "toolbar_bottom_separator": "#282828",
      "tab_background_separator": "#3c3836",
      "tab_background_text": "#d5c4a1",
      "tab_text": "#ebdbb2",
      "tab_line": "#ebdbb2",
      "tab_loading": "#ebdbb2",
      "bookmark_text": "#ebdbb2",
      "sidebar": "#32302f",
      "sidebar_text": "#ebdbb2",
      "sidebar_highlight_text": "#ebdbb2",
      "sidebar_highlight": "#458588",
      "sidebar_border": "#fe8019",
      "toolbar_field": "#3c3836",
      "toolbar_field_focus": "#504945",
      "toolbar_field_border": "#3c3836",
      "toolbar_field_border_focus": "#504945",
      "toolbar_field_highlight": "#83a598",
      "toolbar_field_highlight_text": "#ebdbb2",
      "toolbar_field_text": "#d5c4a1",
      "toolbar_field_text_focus": "#ebdbb2",
      "popup": "#3c3836",
      "popup_text": "#ebdbb2",
      "popup_border": "#3c3836",
      "popup_highlight": "#458588",
      "popup_highlight_text": "#ebdbb2",
      "ntp_background": "#32302f",
      "ntp_text": "#ebdbb2",
      "icons_attention": "rgb(235, 219, 178)",
      "icons": "rgb(235, 219, 178)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{502e512e-f83b-4962-9de9-760701032235}"
    }
  }
}