Examine source code of juxta

{
  "name": "juxta",
  "description": "Juxtaposition compares two things side by side",
  "version": "1.1resigned1",
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "worker.js",
    "popup.html"
  ],
  "content_security_policy": "default-src 'self'; script-src 'self'; object-src 'self'",
  "browser_action": {
    "default_icon": "default-64.png?0",
    "default_title": "juxta"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{9e4e0537-15a2-4217-a788-f95883a0be1e}"
    }
  }
}