zulip/static/templates/settings/ui-settings.handlebars

<div id="ui-settings" class="settings-section" data-name="zulip-labs">
    <div class="alert" id="ui-settings-status"></div>
    <form class="ui-settings-form">
        <div class="tip">{{t "Features for the brave. Labs features may change, break, or disappear at any time." }}</div>

        <h3 class="light">{{t "UI Settings"}}</h3>

        <div class="side-padded-container">
            <div class="input-group">
                <label class="checkbox">
                    <input type="checkbox" class="inline-block change-setting" name="default_desktop_notifications" id="default_desktop_notifications"
                           {{#if page_params.default_desktop_notifications}}
                           checked="checked"
                        {{/if}} />
                    <span></span>
                </label>
                <label for="default_desktop_notifications" class="inline-block">
                    {{t "Enable desktop notifications for new streams" }}
                </label>
            </div>
        </div>
    </form>
</div>