Restore old Google icons

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 2,
    "name": "Restore old Google icons",
    "description": "Restore the old icon on Meet, Calendar and Gmail to make tabs more recognizable",
    "version": "0.1",
    "content_scripts": [
        {
            "matches": [
                "*:\/\/calendar.google.com\/*"
            ],
            "js": [
                "calendar_script.js"
            ]
        },
        {
            "matches": [
                "*:\/\/docs.google.com\/*"
            ],
            "js": [
                "docs_script.js"
            ]
        },
        {
            "matches": [
                "*:\/\/drive.google.com\/*"
            ],
            "js": [
                "drive_script.js"
            ]
        },
        {
            "matches": [
                "*:\/\/mail.google.com\/*"
            ],
            "js": [
                "gmail_script.js"
            ]
        },
        {
            "matches": [
                "*:\/\/meet.google.com\/*"
            ],
            "js": [
                "meet_script.js"
            ]
        }
    ],
    "browser_action": {
        "default_icon": "icon16.png",
        "default_popup": "popup.html"
    },
    "background": {
        "scripts": [
            "background.js"
        ],
        "persistent": false
    }
}