Let Me Out

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Let Me Out",
  "short_name": "letmeout",
  "description": "Prevents actions (like alerts) when navigating away from a page.",
  "version": "1.3",
  "web_accessible_resources": [
    "before.inject.js",
    "after.inject.js"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "before.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "after.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ]
}