Apple TV SubStyler : customize subtitles

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "Apple TV SubStyler : customize subtitles",
    "description": "Extension to customize captions and subtitles on Apple TV. Change text size, font, color and add background.",
    "version": "1.0.12",
    "manifest_version": 3,
    "permissions": [
        "storage"
    ],
    "host_permissions": [
        "*:\/\/*.tv.apple.com\/*"
    ],
    "action": {
        "default_popup": "popup.html",
        "default_icon": "Apple128SubStyler.png"
    },
    "content_scripts": [
        {
            "js": [
                "options.js",
                "engine.js",
                "appletv.min.js"
            ],
            "matches": [
                "*:\/\/*.tv.apple.com\/*"
            ]
        }
    ],
    "icons": {
        "36": "Apple36SubStyler.png",
        "128": "Apple128SubStyler.png"
    },
    "background": {
        "service_worker": "background.js"
    }
}