ctrlw

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "ctrlw",
  "author": "Sam Lazarus",
  "version": "0.0.1",
  "description": "A no-op extension. Useful for killing the dreaded Ctrl-W hotkey!",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "images/Icon16.png",
    "32": "images/Icon32.png",
    "48": "images/Icon48.png",
    "128": "images/Icon128.png"
  },
  "commands": {
    "do-nothing": {
      "suggested-key": {
        "default": "Ctrl-W",
        "mac": "MacCtrl-W"
      },
      "description": "Do absolutely nothing!"
    },
    "close-tab": {
      "suggested-key": {
        "default": "Alt-W"
      },
      "description": "Close the current tab"
    }
  },
  "manifest_version": 2
}