Examine source code of rss.html

{
  "manifest_version": 2,
  "name": "rss.html",
  "version": "0.2.1resigned1",
  "author": "cblood",
  "description": "Renders some rss feeds as html",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "main.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "rss.html",
    "rss.html.js",
    "rss.html.css",
    "rss.html.xsl"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{332b9ecd-d35a-41b4-b633-d19adfaec462}"
    }
  }
}