Examine source code of Soda PDF Viewer

{
  "description": "Allows you to view pdf files with the Soda online pdf viewer.",
  "manifest_version": 2,
  "name": "Soda_PDF_Viewer",
  "version": "1.0.0.1",
  "applications": {
    "gecko": {
      "id": "@lulu-soft-123",
      "strict_min_version": "55.0"
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*/*",
    "tabs",
    "contextMenus",
    "downloads"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}