Message deleter for Slack 2.0

{
    "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"
        }
    ]
}