Examine source code of Survol

{
  "manifest_version": 2,
  "version": "0.6.0",
  "name": "__MSG_extensionName__",
  "short_name": "__MSG_extensionShortName__",
  "description": "__MSG_extensionDescription__",
  "author": "Maxime DOLORES - mdolr",
  "default_locale": "en",
  "permissions": [
    "https://*/*",
    "http://*/*",
    "file:///*",
    "tabs",
    "activeTab",
    "storage",
    "unlimitedStorage"
  ],
  "icons": {
    "128": "/images/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file:///*/*"
      ],
      "js": [
        "js/templates/wikipedia.js",
        "js/templates/base.js",
        "js/templates/reddit.js",
        "js/templates/twitter.js",
        "js/templates/youtube.js",
        "js/templates/stackexchange.js",
        "js/templates/soundcloud.js",
        "js/core.js"
      ],
      "css": [
        "css/base.css",
        "css/templates/wikipedia.css",
        "css/templates/reddit.css",
        "css/templates/twitter.css",
        "css/templates/youtube.css",
        "css/templates/stackexchange.css",
        "css/templates/soundcloud.css"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "js/background/auxiliary.js"
    ]
  },
  "browser_action": {
    "default_title": "Survol",
    "default_popup": "html/popup.html"
  },
  "web_accessible_resources": [
    "images/upvote.png",
    "images/comment.png",
    "images/reddit.png"
  ]
}