Examine source code of Spaceart

{
  "name": "Spaceart",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot from 2023-06-27 20-55-02.png"
    },
    "colors": {
      "frame": "rgba(14, 31, 47, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(14, 31, 47, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(14, 31, 47, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1074650d-8f2f-4778-9553-235f7c969b59}"
    }
  }
}