Bingo

manifest.json

{
  "name": "Bingo",
  "version": "0.1",
  "description": "Add Google search button to Bing.",
  "manifest_version": 2,
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "bingo.js"
      ],
      "matches": [
        "*://*.bing.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "tabs"
  ],
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}