Go Back With BackSpace

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 2,
    "name": "Go Back With BackSpace",
    "description": "This extension Goes Back With BackSpace",
    "version": "1.0",
    "browser_action": {
        "default_icon": "icon.png",
        "default_title": "GBWB!"
    },
    "content_scripts": [
        {
            "matches": [
                ""
            ],
            "js": [
                "contentscript.js"
            ],
            "run_at": "document_start",
            "all_frames": true,
            "match_about_blank": true
        }
    ]
}