Neat Messages for Gmail

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "version": "2.0.3",
    "name": "Neat Messages for Gmail",
    "description": "Improves the readibility of plain text Gmail messages by putting them in a neat container.",
    "icons": {
        "16": "img\/icon-16.png",
        "48": "img\/icon-48.png",
        "128": "img\/icon-128.png"
    },
    "author": {
        "email": "[email protected]"
    },
    "permissions": [
        "storage"
    ],
    "options_page": "options\/index.html",
    "action": {
        "default_icon": "img\/icon-16.png",
        "default_popup": "popup\/index.html"
    },
    "content_scripts": [
        {
            "css": [
                "css\/style.css"
            ],
            "js": [
                "js\/script.js"
            ],
            "matches": [
                "http:\/\/mail.google.com\/*",
                "https:\/\/mail.google.com\/*"
            ],
            "run_at": "document_end"
        }
    ]
}