Examine source code of Easy To Read

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Easy To Read",
  "manifest_version": 2,
  "description": "Simple theme that makes it easier to see the tabs and menu bar with Firefox's newest \"upgrade\".  Perfect for people that are having trouble seeing the tabs using the prettier themes."
}