Examine source code of my hero academia

{
  "name": "@adame_lgzl",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Sans titre.png"
    },
    "colors": {
      "frame": "rgba(12, 12, 13, 0.94)",
      "tab_background_text": "rgba(8, 8, 8, 1)",
      "toolbar": "rgba(143, 26, 26, 0)",
      "bookmark_text": "rgba(15, 14, 15, 1)",
      "toolbar_field": "rgba(252, 252, 237, 0.63)",
      "toolbar_field_text": "rgba(7, 8, 7, 1)"
    }
  }
}