What the font

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "version": "2.1",
    "name": "__MSG_appName__",
    "description": "__MSG_appDesc__",
    "default_locale": "en",
    "manifest_version": 3,
    "icons": {
        "16": "images\/icon-16.png",
        "24": "images\/icon-24.png",
        "32": "images\/icon-32.png",
        "48": "images\/icon-48.png",
        "128": "images\/icon-128.png"
    },
    "background": {
        "service_worker": "background.js"
    },
    "permissions": [
        "contextMenus",
        "scripting",
        "activeTab"
    ],
    "action": {
        "default_icon": {
            "16": "images\/icon-16.png",
            "24": "images\/icon-24.png",
            "32": "images\/icon-32.png",
            "48": "images\/icon-48.png"
        }
    }
}