Playback Rate Controller

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Playback Rate Controller",
  "short_name": "PRC",
  "description": "Take control over video playback speed! Change video/audio playback rates of HTML5 media including YouTube videos.",
  "version": "1.3.1",
  "icons": {
    "16": "icon-16x16.png",
    "48": "icon-48x48.png",
    "128": "icon-128x128.png"
  },
  "browser_action": {
    "default_icon": "icon-48x48.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_main.js"
      ],
      "all_frames": true
    }
  ]
}