Slack History

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Slack History",
  "description": "Extension to keep Slack history",
  "version": "0.0.0.3",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*",
    "downloads",
    "storage"
  ],
  "web_accessible_resources": [
    "inject.html",
    "historyPopup.html"
  ],
  "manifest_version": 2
}