Examine source code of Eye Easy

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#3d0808",
      "tab_background_text": "#deb4b2"
    }
  },
  "version": "2.0",
  "name": "Eye Easy",
  "manifest_version": 2,
  "description": "I am a person with low vision, the typical white webpage is hard on my eyes, but when I  use a dark background and light colored fonts it works much better for me."
}