Examine source code of Cleveland Browns

{
  "name": "Cleveland Browns",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "brownspattern.png"
    },
    "colors": {
      "frame": "rgba(51, 32, 2, 0.33)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(51, 31, 2, 0.33)",
      "bookmark_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(239, 67, 35, 0.33)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgb(239, 67, 35)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{de77cc30-ef5d-4f81-92ee-b1901d99e922}"
    }
  }
}