manifest.json

{
    "manifest_version": 3,
    "name": "YouTube Pearify",
    "version": "1.0",
    "icons": {
        "1280": "icon.png"
    },
    "description": "Modify YouTube thumbnails to include RoyalPear's mascot, Tropius",
    "action": {
        "default_popup": "settings.html"
    },
    "permissions": [
        "storage"
    ],
    "host_permissions": ["*://*.youtube.com/*"],
    "content_scripts": [{
        "matches": ["*://*.youtube.com/*"],
        "js": ["pearify.js"],
        "run_at": "document_idle"
    }],
    "web_accessible_resources": [{
        "resources": [
            "images/*.png",
            "images/*.json",
            "logo/*.png",
            "devious/DO-NOT-OPEN.png",
            "icons/*.png",
            "fonts/*.ttf",
            "css/*.css"
        ],
        "matches": [
            "*://*/*"
        ]
    }]
}