Vectr

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "app": {
    "background": {
      "scripts": [
        "background.js"
      ]
    }
  },
  "manifest_version": 2,
  "name": "Vectr",
  "version": "1.7.4",
  "default_locale": "en",
  "description": "Vectr is free, simple and most intuitive vector graphics editing software.",
  "icons": {
    "128": "icon_128.png"
  },
  "author": "Vectr Labs",
  "externally_connectable": {
    "matches": [
      "*://*.google.com/*",
      "*://*.facebook.com/*",
      "*://*.twitter.com/*"
    ]
  },
  "permissions": [
    "webview"
  ]
}