Videochat Auto-mute

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 2,
    "name": "Videochat Auto-mute",
    "description": "This extension keeps your microphone muted in Acano, Appear.in, and Google Hangouts unless you hold down the space bar.",
    "version": "0.3",
    "content_scripts": [
        {
            "matches": [
                "https:\/\/join.mycospace.com\/*"
            ],
            "js": [
                "jquery-1.12.1.min.js",
                "lib\/acano.js"
            ]
        },
        {
            "matches": [
                "https:\/\/appear.in\/*"
            ],
            "js": [
                "jquery-1.12.1.min.js",
                "lib\/appearin.js"
            ]
        },
        {
            "matches": [
                "https:\/\/plus.google.com\/hangouts\/_\/*\/*"
            ],
            "js": [
                "jquery-1.12.1.min.js",
                "lib\/hangouts.js"
            ]
        }
    ]
}