Examine source code of errevm

{
  "theme": {
    "images": {
      "theme_frame": "P1010385c.jpg"
    },
    "colors": {
      "frame": "#98eb8d",
      "tab_background_text": "#073610"
    }
  },
  "version": "2.0",
  "name": "errevm",
  "manifest_version": 2
}