Silent YouTube Ads

Moral silencing of YouTube ads.
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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Silent YouTube Ads",
  "author": "Tim Branyen (@tbranyen)",
  "version": "0.1.4",
  "description": "Moral silencing of YouTube ads.",
  "default_locale": "en",
  "content_scripts": [
    {
      "matches": [
        "http://*.youtube.com/watch*",
        "https://*.youtube.com/watch*"
      ],
      "js": [
        "js/contentscript.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "web_accessible_resources": [
    "js/**/*",
    "js/contentscript.js.map"
  ]
}