Examine source code of Night

{
  "name": "Night",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot 2023-06-20 at 11-58-37 Midnight – Get this Theme for 🦊 Firefox (en-GB).png"
    },
    "colors": {
      "frame": "rgba(13, 13, 21, 1)",
      "tab_background_text": "rgba(76, 86, 106, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(129, 161, 193, 1)",
      "toolbar_field": "rgba(0, 1, 10, 1)",
      "toolbar_field_text": "rgba(136, 192, 208, 1)",
      "tab_line": "rgba(97, 138, 149, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3ae977e3-f896-419e-9cc0-99615d797bf9}"
    }
  }
}