Examine source code of CCRatingPredictor

{
  "manifest_version": 2,
  "name": "RatingPredictor",
  "version": "1.1",
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "http://ccpredictor-ccrate.apps.us-east-2.online-starter.openshift.com/contest/*",
    "https://ccpredictor-ccrate.apps.us-east-2.online-starter.openshift.com/contest/*",
    "https://www.freecodecamp.com/*"
  ],
  "icons": {
    "48": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.codechef.com/*"
      ],
      "js": [
        "content_script/main1.js",
        "content_script/jquery.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_title": "RatingPredictor",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "back.js"
    ]
  }
}