Examine source code of Ecosia - plain

{
  "theme": {
    "images": {
      "theme_frame": "Persona-Ecosiaplain-Header.jpg"
    },
    "colors": {
      "frame": "#acffce",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Ecosia - plain",
  "manifest_version": 2,
  "description": "Promotion of <a href=\"https://outgoing.prod.mozaws.net/v1/514495294fbaf8b849ccd9de5c67cbba2ebfeef2bce072bab6ab414113c6ad11/http%3A//www.ecosia.org\" rel=\"nofollow\">www.ecosia.org</a>, a search engine page that supports the World Wildlife Fund (WWF) rainforest projects. No slogan."
}