new class {
    constructor(n) {
        this.numTabsToLoad = n;
        gBrowserInit.idleTasksFinishedPromise.then(() => {
            gBrowser.tabContainer.addEventListener("TabSelect", this, false);
            window.addEventListener("unload", this, false);
            this.loadTabsOnRight(gBrowser.selectedTab);
        });
    }
    handleEvent(event) {
        switch (event.type) {
            case "TabSelect":
                this.loadTabsOnRight(event.target);
                break;
            case "unload":
                gBrowser.tabContainer.removeEventListener("TabSelect", this, false);
                window.removeEventListener("unload", this, false);
                break;
        }
    }
    loadTabsOnRight(tab) {
        let i = tab._tPos+1;
        let n = Math.min(gBrowser.tabs.length, i+this.numTabsToLoad);
        for (; i<n; i++) {
            if (gBrowser.tabs[i].linkedBrowser.isConnected) continue;
            gBrowser.reloadTab(gBrowser.tabs[i]);
        }
    }
}(2);