Get Referrer URL

Adds a little icon in the URL bar that lets you see the referring URL (the page you opened the current tab from)

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Get Referrer URL",
  "version": "0.0.1",
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "page_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}