Examine source code of Sweet Private Search

{
  "name": "Sweet Private Search",
  "applications": {
    "gecko": {
      "id": "sweetsearch@usesweet.com",
      "strict_min_version": "57.0"
    }
  },
  "version": "2018.3.3resigned1",
  "description": "Private Search Engine and Privacy Tools. Automatically blocks third party trackers.",
  "icons": {
    "16": "img/logo16.png",
    "48": "img/logo48.png",
    "128": "img/logo128.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "19": "img/icon19.png",
      "38": "img/icon38.png"
    },
    "default_popup": "html/popup.html"
  },
  "omnibox": {
    "keyword": "d"
  },
  "background": {
    "scripts": [
      "public/js/background.js"
    ]
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "favicon_url": "https://www.usesweet.com/img/sweet_logo.png",
      "is_default": true,
      "keyword": "usesweet.com",
      "name": "Sweet Search",
      "search_url": "https://www.usesweet.com/?q={searchTerms}",
      "suggest_url": "https://www.usesweet.com/ac/?q={searchTerms}&type=list"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "css": [
        "public/css/noatb.css"
      ],
      "run_at": "document_start"
    },
    {
      "js": [
        "public/js/content-scripts/element-hiding.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "match_about_blank": true,
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "contextMenus",
    "webRequest",
    "webRequestBlocking",
    "*://*/*",
    "webNavigation",
    "activeTab",
    "tabs",
    "cookies",
    "storage",
    "<all_urls>",
    "alarms"
  ],
  "web_accessible_resources": [
    "img/*"
  ]
}