Examine source code of etoiles violettes

{
  "theme": {
    "images": {
      "theme_frame": "MF.jpg"
    },
    "colors": {
      "frame": "#ebebeb",
      "tab_background_text": "#dedede"
    }
  },
  "version": "2.0",
  "name": "etoiles violettes",
  "manifest_version": 2,
  "description": "A beautiful starry sky image, inspired by sci-fi light effects."
}