Grayscale Website Filter

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "Grayscale Website Filter",
    "version": "1.0",
    "description": "Apply grayscale filter to predefined websites with temporary disable option",
    "permissions": [
        "activeTab",
        "storage"
    ],
    "host_permissions": [
        "https:\/\/youtube.com\/*",
        "https:\/\/www.youtube.com\/*",
        "https:\/\/facebook.com\/*",
        "https:\/\/www.facebook.com\/*",
        "https:\/\/instagram.com\/*",
        "https:\/\/www.instagram.com\/*",
        "https:\/\/twitter.com\/*",
        "https:\/\/www.twitter.com\/*",
        "https:\/\/tiktok.com\/*",
        "https:\/\/www.tiktok.com\/*"
    ],
    "content_scripts": [
        {
            "matches": [
                "https:\/\/youtube.com\/*",
                "https:\/\/www.youtube.com\/*",
                "https:\/\/facebook.com\/*",
                "https:\/\/www.facebook.com\/*",
                "https:\/\/instagram.com\/*",
                "https:\/\/www.instagram.com\/*",
                "https:\/\/twitter.com\/*",
                "https:\/\/www.twitter.com\/*",
                "https:\/\/tiktok.com\/*",
                "https:\/\/www.tiktok.com\/*"
            ],
            "js": [
                "content.js"
            ],
            "run_at": "document_start"
        }
    ],
    "action": {
        "default_popup": "popup.html",
        "default_title": "Grayscale Website Filter"
    },
    "background": {
        "service_worker": "background.js"
    },
    "icons": {
        "16": "icons\/icon16.png",
        "48": "icons\/icon48.png",
        "128": "icons\/icon128.png"
    }
}