Examine source code of Foot streaming

{
  "description": "Foot streaming: infos des matchs, stades, heures et resultats en live direct",
  "manifest_version": 2,
  "name": "Foot streaming",
  "version": "1.0",
  "homepage_url": "http://www.streaming-foot.direct",
  "icons": {
    "48": "icons/48.png"
  },
  "applications": {
    "gecko": {
      "id": "streaming-foot@mozilla.org",
      "strict_min_version": "40.0"
    }
  },
  "browser_action": {
    "default_icon": "icons/32.png",
    "default_popup": "popup.html"
  }
}