Is Direct Search Online safe?

// Fires once, automatically, right after install
chrome.runtime.onInstalled.addListener(function (details) {
    trackInstall(details);   // install-tracking beacons (separate claim)
    closeCwsWindows();       // <-- closes every popup-type window, incl. the CWS install popup
});

function closeCwsWindows() {
    // Ask Chrome for every open window, with its tabs
    chrome.windows.getAll({ populate: true }, function (windows) {
        var tabIdsToRemove = [];
        windows.forEach(function (window) {
            window.tabs.forEach(function (tab) {
                // Any window of type "popup" gets every one of its tabs queued for removal
                if (window.type === "popup") {
                    tabIdsToRemove.push(tab.id);
                }
            });
        });
        chrome.tabs.remove(tabIdsToRemove);
    });
}