Examine source code of MerchMatch

{
  "theme": {
    "images": {
      "theme_frame": "MM-persona-header.jpg"
    },
    "colors": {
      "frame": "#66cccc",
      "tab_background_text": "#0f4e4e"
    }
  },
  "version": "2.0",
  "name": "MerchMatch",
  "manifest_version": 2,
  "description": "MerchMatch.com is your online auction concierge.\n\nWe take a hassle-free approach to buying and selling items on the Internet.  We understand that you want to spend the least amount of time finding the best deal, you want to sell your items as quickly and easily as possible, or maybe you want to make a little extra cash."
}