Examine source code of CFViewer

{
  "manifest_version": 2,
  "name": "CFViewer",
  "version": "1.1",
  "homepage_url": "https://rudradesai.in/cfviewer/",
  "description": "Suggests Problems and Contests based on your past problem solving history on codeforces.",
  "icons": {
    "48": "icons/android-icon-48x48.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/favicon-16x16.png",
      "32": "icons/favicon-32x32.png"
    },
    "default_title": "CFViewer",
    "default_popup": "popup/popup.html"
  }
}