Skinny

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Skinny",
  "description": "This extension lets you limit the width of any web page, for better readability on big screens.",
  "version": "1.8",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "extensionEvents.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "tab.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "icon_16_off.png",
    "48": "icon_48_on.png",
    "128": "icon_128_on.png"
  },
  "browser_action": {
    "default_title": "Make this site skinny",
    "default_icon": "icon_16_off.png"
  }
}