Message deleter for Slack 2.0

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Message deleter for Slack 2.0",
  "manifest_version": 2,
  "description": "Delete Slack messages in bulk - channels, private channels and direct messages supported",
  "version": "2.9.3",
  "icons": {
    "16": "icon/icon-16.png",
    "32": "icon/icon-32.png",
    "48": "icon/icon-48.png",
    "128": "icon/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "icon/icon-19.png",
      "38": "icon/icon-38.png"
    },
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://app.slack.com/*"
      ],
      "js": [
        "js/hook.js"
      ],
      "run_at": "document_start"
    }
  ]
}