This is the source code:
{
"manifest_version": 2,
"version": "1.0",
"name": "Humble Gruvbox",
"theme": {
"colors": {
"accentcolor": "#282828",
"icons_attention": "#fabd2f",
"ntp_background": "#282828",
"ntp_text": "#fdf4c1",
"popup": "#3c3836",
"popup_border": "#282828",
"popup_highlight": "#7c6f64",
"popup_text": "#fdf4c1",
"sidebar": "#282828",
"sidebar_border": "#3c3836",
"sidebar_highlight": "#7c6f64",
"sidebar_text": "#fdf4c1",
"tab_background_separator": "black",
"tab_line": "#282828",
"tab_loading": "#fabd2f",
"tab_text": "#fabd2f",
"textcolor": "#fdf4c1",
"toolbar": "#282828",
"toolbar_field": "black",
"toolbar_field_border_focus": "#fabd2f",
"toolbar_field_separator": "black",
"toolbar_field_text": "#fdf4c1",
"toolbar_text": "#fdf4c1",
"toolbar_vertical_separator": "#282828"
}
}
}
Unfortunately, on some Firefox instances that I've tested, the new-tab-page (NTP) doesn't have a gruvbox-dark background although it's set in this theme.
