Crows

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Crows",
  "version": "1.2",
  "description": "Crossword Solver",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "activeTab",
    "https://www.wordplays.com/",
    "http://www.the-crossword-solver.com/"
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "windows": "Alt+C",
        "mac": "Alt+C",
        "linux": "Alt+C"
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_title": "Solve crossword clues.",
    "default_popup": "popup.html"
  }
}