Examine source code of Keyboard Savior Xtreme

{
  "applications": {
    "gecko": {
      "id": "ksx@josiahulfers.com",
      "strict_min_version": "58.0"
    }
  },
  "background": {
    "scripts": [
      "shared.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/ksx16.png",
      "32": "icons/ksx32.png",
      "64": "icons/ksx64.png"
    },
    "default_title": "Keyboard Savior Xtreme"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "savior.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "Stops sites from hijacking keyboard shortcuts",
  "homepage_url": "https://ksx.josiahulfers.com",
  "icons": {
    "48": "icons/ksx48.png",
    "96": "icons/ksx96.png"
  },
  "manifest_version": 2,
  "name": "Keyboard Savior Xtreme",
  "options_ui": {
    "page": "settings.html"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "version": "1.6"
}