Examine source code of Demonic Alastor!

{
  "name": "Demonic Alastor!",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Alastor Firefox Theme5_00001.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(255, 219, 219, 1)",
      "toolbar": "rgba(56, 0, 0, 0.74)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(15, 0, 0, 0.86)",
      "toolbar_field_text": "rgba(255, 240, 240, 1)",
      "tab_line": "rgba(120, 58, 19, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{64a0e084-3f15-40c1-9cd2-61f188e6f5de}"
    }
  }
}