Random color for YouTube's progress bar

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 2,
    "name": "Random color for YouTube's progress bar",
    "description": "Change red color for a random of the YouTube's progress bar",
    "version": "1.1",
    "content_scripts": [
        {
            "js": [
                "script.js"
            ],
            "matches": [
                "http:\/\/*\/*",
                "https:\/\/*\/*"
            ]
        }
    ],
    "browser_action": {
        "default_icon": "img\/icon.png",
        "default_popup": "popup.html"
    },
    "icons": {
        "128": "img\/icon_128.png"
    },
    "background": {
        "scripts": [
            "script.js"
        ]
    }
}