Examine source code of Levi Ackerman Theme

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Levi Ackerman Theme",
  "manifest_version": 2,
  "description": "Levi Ackerman Firefox Theme by -Taiyou on MAL (MyAnimeList) and CrusaderInfinity on DeviantArt (formerly, but I'm citing this anyway). Render credits go to <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/d6dca0822b27af8c75423ea25481db9fdaefed53ea4988ec1503d5341d5a3b37/http%3A//sugoi-yuki.repage7.de\">sugoi-yuki.repage7.de</a>"
}