Gmail POP3 Auto Refresh

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "Gmail POP3 Auto Refresh",
    "version": "2.1",
    "description": "Refresh unlimited POP3 email accounts of Gmail with a frequency of one minute for free.",
    "permissions": [
        "tabs",
        "alarms",
        "storage"
    ],
    "content_security_policy": {
        "extension_pages": "script-src 'self'; object-src 'self'"
    },
    "background": {
        "service_worker": "background.js",
        "type": "module"
    },
    "options_ui": {
        "page": "options.html",
        "open_in_tab": true
    },
    "icons": {
        "128": "icon.png"
    },
    "content_scripts": [
        {
            "matches": [
                "*:\/\/mail.google.com\/*"
            ],
            "js": [
                "content.js"
            ]
        }
    ]
}