Examine source code of RE:V landscape

{
  "name": "RE:V landscape",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "village header.png"
    },
    "colors": {
      "frame": "rgba(20, 20, 20, 1)",
      "tab_background_text": "rgba(162, 165, 222, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1c0222db-fee8-42be-a4f3-9c14483c2bfa}"
    }
  }
}