Examine source code of Hide Spoilers!

{
  "applications": {
    "gecko": {
      "id": "hide-spoilers@example.com",
      "strict_min_version": "53.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "spoiler.jpg",
    "browser_style": true,
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "spoilers.css"
      ],
      "js": [
        "spoilers.js"
      ]
    }
  ],
  "description": "An extension to help hide potential spoilers!",
  "manifest_version": 2,
  "name": "Hide Spoilers!",
  "permissions": [
    "storage"
  ],
  "version": "1.2resigned1"
}