Examine source code of Steel Train Bullet

{
  "theme": {
    "images": {
      "theme_frame": "steeltrainfirefoxnewnewheader.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#433c61"
    }
  },
  "version": "2.0",
  "name": "Steel Train Bullet",
  "manifest_version": 2,
  "description": "This is a persona of one of my favourite bands, Steel Train. I searched them up and got redirected to a fun. persona that I too wasn't too fond of, so I decided to make my own. I found pretty much all images (all images copyright to their respective owners). Lyrics are to Steel Train's song, Bullet, off of their most recent, as well as self-titled album, Steel Train."
}