Examine source code of NaughtyTweet

{
  "theme": {
    "images": {
      "theme_frame": "nt_personna.header.jpg"
    },
    "colors": {
      "frame": "#363963",
      "tab_background_text": "#0b0c4a"
    }
  },
  "version": "2.0",
  "name": "NaughtyTweet",
  "manifest_version": 2,
  "description": "Are you part of the Naughty Tweet Network? Use the Naughty Tweet persona for your Firefox!"
}