Examine source code of Preeska

{
  "name": "Preeska",
  "version": "1.6.5",
  "description": "Preeska - Tableau de bord personnalisé",
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "homepage_url": "https://www.preeska.com",
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "Preeska",
      "keyword": "preeska",
      "search_url": "https://www.preeska.com/search?q={searchTerms}&source=search&addonversion=1.6.5",
      "favicon_url": "https://www.preeska.com/assets/img/favicon/favicon-96x96.png",
      "suggest_url": "https://www.preeska.com/suggest?q={searchTerms}&source=suggest&addonversion=1.6.5",
      "encoding": "UTF-8",
      "is_default": true
    }
  },
  "permissions": [
    "tabs",
    "cookies",
    "storage",
    "http://www.preeska.com/*",
    "https://www.preeska.com/*",
    "webRequest",
    "webRequestBlocking"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://www.preeska.com/*",
        "https://www.preeska.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "js/contentscript.js"
      ],
      "css": [
        "css/contentStyle.css"
      ],
      "all_frames": true
    }
  ],
  "background": {
    "page": "background.html"
  },
  "manifest_version": 2
}