Grackle Accessibility Checker for G Suite

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Grackle Accessibility Checker for G Suite",
  "description": "Quickly check to see if this Google Document or Sheets is accessible.",
  "version": "1.6",
  "permissions": [
    "declarativeContent",
    "tabs",
    "https://docs.google.com/document/d",
    "https://docs.google.com/spreadsheets/d"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_security_policy": "script-src 'self' https://script.google.com https://script.googleusercontent.com; object-src 'self'",
  "page_action": {
    "default_icon": "grackle-16x16.png",
    "default_popup": "popup.html",
    "default_title": "Grackle Accessibility Checker for G Suite"
  },
  "manifest_version": 2
}