Examine source code of Blur Page Elements

{
  "manifest_version": 2,
  "name": "Blur Page Elements",
  "version": "1.0",
  "description": "Apply a blur effect to images or text on webpages.",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/blur-48.png",
    "default_popup": "popup.html",
    "default_title": "Blur Elements"
  },
  "icons": {
    "48": "icons/blur-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{65820f41-82d2-43e3-b4a2-e46e802b9b5b}"
    }
  }
}