Tab Badges

manifest.json

{
  "update_url": "http://clients2.google.com/service/update2/crx",
  "name": "Tab Badges",
  "version": "1.5.2",
  "manifest_version": 2,
  "description": "This extension adds number badges to tabs when CTRL-ALT is pressed.",
  "icons": {
    "128": "images/icon.png"
  },
  "browser_action": {
    "default_title": "CTRL-ALT to see your badges!",
    "default_icon": "images/off.png"
  },
  "background": {
    "scripts": [
      "js/badges.js"
    ]
  },
  "web_accessible_resources": [
    "images/icon.png",
    "images/off.png",
    "images/temporary.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/capture_keyboard_events.js"
      ]
    }
  ],
  "permissions": [
    "tabs"
  ]
}