Examine source code of Pretty XML

{
  "name": "Pretty XML",
  "version": "0.1.1resigned1",
  "description": "Powerful XML viewer for Firefox",
  "manifest_version": 2,
  "background": {
    "page": "background.html"
  },
  "permissions": [
    "tabs",
    "clipboardWrite",
    "webRequest",
    "webRequestBlocking",
    "storage",
    "http://*/*",
    "https://*/*"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "content_scripts": [
    {
      "js": [
        "xv.js",
        "controller.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ],
      "run_at": "document_start"
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "web_accessible_resources": [
    "xv.css"
  ],
  "page_action": {
    "default_icon": {
      "16": "page-action-16.png",
      "24": "page-action-24.png",
      "32": "page-action-32.png"
    },
    "default_title": "Toggle page rendering with XV plugin"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dd6008c8-a74c-47ab-8df5-04412a046725}"
    }
  }
}