Prime Video SubStyler : customize subtitles

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "__MSG_name__",
    "description": "__MSG_description__",
    "default_locale": "en",
    "version": "1.0.9",
    "manifest_version": 3,
    "permissions": [
        "storage"
    ],
    "host_permissions": [
        "*:\/\/*.primevideo.com\/*",
        "*:\/\/*.amazon.com\/*",
        "*:\/\/*.amazon.co.uk\/*",
        "*:\/\/*.amazon.de\/*",
        "*:\/\/*.amazon.co.jp\/*"
    ],
    "action": {
        "default_popup": "popup.html",
        "default_icon": "SubStyler36Prime.png"
    },
    "content_scripts": [
        {
            "js": [
                "options.js",
                "fonts.js",
                "engine.js"
            ],
            "css": [
                "fonts.css"
            ],
            "matches": [
                "*:\/\/*.primevideo.com\/*",
                "*:\/\/*.amazon.com\/*",
                "*:\/\/*.amazon.co.uk\/*",
                "*:\/\/*.amazon.de\/*",
                "*:\/\/*.amazon.co.jp\/*"
            ]
        }
    ],
    "icons": {
        "36": "SubStyler36Prime.png",
        "128": "SubStyler128Prime.png"
    },
    "background": {
        "service_worker": "background.js"
    }
}