Examine source code of Boletus Mushroom

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#FFFF00"
    }
  },
  "version": "2.0",
  "name": "Boletus Mushroom",
  "manifest_version": 2,
  "description": "Theme Designed by <b>candelora ©</b> \nManipulation of Free Image found on Web\n\n<b>Semi-transparent Background</b>  NO Windows 10\n\nTAGS:\nnature,cold,wet,rain,mold,falls,withered,wood,forest,\ntrees,leaf,green,orange,yellow,winter,parkland,fog,\nautumn,photography,candelora,firefox"
}