Examine source code of anime eyes

{
  "name": "eyes",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "c58536f84b53a1959ac56cd617238b95.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 0.58)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.58)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(133, 133, 133, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{895df988-586d-4edc-9e85-557586727cf1}"
    }
  }
}