Clear TweetDeck Columns

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 2,
    "minimum_chrome_version": "45",
    "name": "Clear TweetDeck Columns",
    "version": "1.2",
    "description": "An extension to improve TweetDeck by adding a button which clears all columns.",
    "icons": {
        "16": "src\/img\/icon16.png",
        "48": "src\/img\/icon48.png",
        "128": "src\/img\/icon128.png"
    },
    "permissions": [
        "tabs",
        ""
    ],
    "background": {
        "scripts": [
            "src\/background.js"
        ],
        "persistent": false
    },
    "content_scripts": [
        {
            "matches": [
                "*:\/\/*.tweetdeck.twitter.com\/*"
            ],
            "css": [
                "src\/style.css"
            ],
            "js": [
                "src\/clear.js"
            ]
        }
    ]
}