manifest.json

{
    "manifest_version": 3,
    "name": "Fontonic - Change Fonts",
    "description": "Change fonts of any website with your locally installed fonts!",
    "version": "1.7.4",
    "action": {
        "default_icon": {
            "16": "./res/icons/favicon-16x16.png",
            "32": "./res/icons/favicon-32x32.png",
            "96": "./res/icons/favicon-96x96.png"
        },
        "default_title": "Click to customize fonts",
        "default_popup": "./popup/popup.html"
    },
    "permissions": [
        "storage",
        "tabs",
        "fontSettings"
    ],
    "content_scripts": [
        {
            "matches": [
                "https://*/*",
                "http://*/*"
            ],
            "js": [
                "./js/content.js"
            ]
        }
    ],
    "background": {
        "service_worker": "./js/background.js"
    }
}