Examine source code of dark mint

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "dark mint",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(23, 18, 19)",
      "toolbar_text": "rgb(106, 148, 124)",
      "frame": "rgb(23, 18, 19)",
      "tab_background_text": "rgb(217, 217, 217)",
      "toolbar_field": "rgb(23, 18, 19)",
      "toolbar_field_text": "rgb(106, 148, 124)",
      "tab_line": "rgb(106, 148, 124)",
      "popup": "rgb(23, 18, 19)",
      "popup_text": "rgb(106, 148, 124)",
      "tab_loading": "rgb(106, 148, 124)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ab701efc-a2e2-4226-a307-6dd12808de78}"
    }
  }
}