Examine source code of Catpucc

{
  "name": "Catpucc",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Captura desde 2022-06-23 23-54-11.png"
    },
    "colors": {
      "frame": "rgba(36, 39, 58, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(36, 39, 58, 1)",
      "bookmark_text": "rgba(247, 193, 150, 1)",
      "toolbar_field": "rgba(49, 50, 68, 1)",
      "toolbar_field_text": "rgba(193, 203, 238, 1)",
      "tab_line": "rgba(240, 198, 198, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b6fd00c6-7f0b-44ed-b739-b55cb9f53223}"
    }
  }
}