Examine source code of Quora Blur Remover

{
  "manifest_version": 2,
  "name": "Quora Blur Remover",
  "version": "1.2",
  "description": "Removes the Blur on photos from Quora's page",
  "permissions": [
    "activeTab",
    "https://www.quora.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.quora.com/*"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5ebbcd37-584f-4ffb-babc-141dc4cb9e8d}"
    }
  }
}