Examine source code of Reddit Comment Hover

{
  "manifest_version": 2,
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "js/jquery.js",
        "js/comment-hover.js"
      ],
      "css": [
        "css/comment-hover.css"
      ],
      "matches": [
        "http://*.reddit.com/*",
        "https://*.reddit.com/*"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "Let's look at some comments!.",
  "icons": {
    "128": "images/comment-hover-128.png"
  },
  "name": "Reddit Comment Hover",
  "homepage_url": "http://github.com/pvrs12/comment-hover",
  "permissions": [
    "http://*.reddit.com/*",
    "https://*.reddit.com/*"
  ],
  "version": "1.0.5resigned1",
  "applications": {
    "gecko": {
      "id": "pvrs12@gmail.com-commenthover"
    }
  }
}