Examine source code of jouno

{
  "name": "jouno",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot 2022-08-08 at 14-02-11 Bungo Stray Dogs Chapter 59.png"
    },
    "colors": {
      "frame": "rgba(46, 46, 46, 1)",
      "tab_background_text": "rgba(97, 40, 40, 1)",
      "toolbar": "rgba(143, 0, 0, 1)",
      "bookmark_text": "rgba(94, 15, 15, 1)",
      "toolbar_field": "rgba(224, 224, 224, 1)",
      "toolbar_field_text": "rgba(97, 0, 0, 1)",
      "tab_line": "rgba(92, 27, 27, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{04671ef3-50ea-41e1-9e1e-b7856554c12d}"
    }
  }
}