message: Fix AMO review warnings
diff: "homepage_url": "https://github.com/sindresorhus/refined-github",
  "manifest_version": 2,
  "minimum_chrome_version": "49",
  + "applications": {
  + "gecko": {
  + "id": "refined-github@sindresorhus.com",
  + "strict_min_version": "52.0"
  + }
  + },
  "permissions": [
  "storage"
  ],
  