Examine source code of Travez

{
  "manifest_version": 2,
  "name": "Travez",
  "version": "1.1.1",
  "content_scripts": [
    {
      "matches": [
        "*://boardgamearena.com/*/sechsnimmt?table=*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_title": "Travez Show Cards Played",
    "default_icon": "pixil-frame-150_greenbluebackground.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "pixil-frame-16_greenbluebackground.png",
    "48": "pixil-frame-48_greenbluebackground.png",
    "128": "pixil-frame-128_greenbluebackground.png"
  }
}