Endless Whisper

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "Endless Whisper",
    "description": "Plays an inaudible tone to keep the sound card awake.",
    "homepage_url": "https:\/\/github.com\/pmarks-net\/endlesswhisper",
    "version": "1.1",
    "icons": {
        "128": "icon128.png"
    },
    "action": {
        "default_icon": {
            "128": "icon128-gray.png"
        },
        "default_title": "Endless Whisper\nClick to enable\/disable sound keepalive"
    },
    "background": {
        "service_worker": "background.js"
    },
    "permissions": [
        "offscreen",
        "storage",
        "alarms",
        "idle"
    ]
}