Examine source code of FastEasypdf

{
  "applications": {
    "gecko": {
      "id": "search@fasteasypdf.com"
    }
  },
  "name": "FastEasypdf",
  "version": "0.0.5",
  "manifest_version": 2,
  "description": "FastEasypdf",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_icon": "icons/icon16.png"
  },
  "background": {
    "scripts": [
      "src/bg/background.js"
    ],
    "persistent": true
  },
  "chrome_url_overrides": {
    "newtab": "src/tab/index.html"
  },
  "chrome_settings_overrides": {
    "homepage": "https://search.fasteasypdf.com/redirect.php?c=23267&surl=https://fasteasypdf.com&kw={searchTerms}",
    "search_provider": {
      "encoding": "UTF-8",
      "is_default": true,
      "keyword": "",
      "name": "FastEasypdf",
      "search_url": "https://search.fasteasypdf.com/redirect.php?c=23267&surl=https://fasteasypdf.com&kw={searchTerms}"
    }
  },
  "permissions": [
    "*://search.fasteasypdf.com/redirect.php*",
    "*://*.google.com/*",
    "storage",
    "tabs",
    "activeTab",
    "webRequest",
    "webRequestBlocking"
  ]
}