Gmail Template with Attachment

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "__MSG_appName__",
    "description": "__MSG_shortDesc__",
    "default_locale": "en",
    "icons": {
        "128": "dop_files\/icon_load.png"
    },
    "version": "1.4",
    "content_scripts": [
        {
            "matches": [
                "https:\/\/mail.google.com\/*"
            ],
            "js": [
                "content.js",
                "script.js"
            ],
            "run_at": "document_end"
        }
    ],
    "background": {
        "service_worker": "background.js"
    },
    "permissions": [
        "scripting"
    ],
    "host_permissions": [
        "https:\/\/mail.google.com\/"
    ],
    "manifest_version": 3,
    "web_accessible_resources": [
        {
            "resources": [
                "*.map",
                "dop_files\/icon_load.png",
                "dop_files\/icon_use.png"
            ],
            "matches": [
                "https:\/\/mail.google.com\/*"
            ]
        }
    ]
}