Examine source code of Ridge change.

{
  "theme": {
    "images": {
      "theme_frame": "0904-sky-sy-sra-oooo-tochu--2.jpg"
    },
    "colors": {
      "frame": "#f5ebeb",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Ridge change.",
  "manifest_version": 2,
  "description": "0904-sky-sy-sra-oooo-tochu--2"
}