Stack Overflow Add Labels to Secondary Nav

so-secondary-nav-labels.css

@-moz-document domain("stackoverflow.com") {
    .so-header .secondary-nav .js-inbox-button,
    .so-header .secondary-nav .js-achievements-button,
    .so-header .secondary-nav .js-review-button,
    .so-header .secondary-nav .js-site-switcher-button
    {
        display: block;
        text-align: center;
    }
    
    .so-header .secondary-nav .svg-icon
    {
        margin-top: -0.5rem;
    }
    
    .so-header .secondary-nav .js-inbox-button:after,
    .so-header .secondary-nav .js-achievements-button:after,
    .so-header .secondary-nav .js-review-button:after,
    .so-header .secondary-nav .js-site-switcher-button:after
    {
        text-align: center;
        display: block;
        font-family: sans-serif;
        font-size: 12px;
        margin-top: -2.75rem; 
    }
    
    .so-header .secondary-nav .js-inbox-button:after
    {
        content: 'inbox';
    }
    
    .so-header .secondary-nav .js-achievements-button:after
    {
        content: 'awards';
    }
    
    .so-header .secondary-nav .js-review-button:after
    {
        content: 'review';
    }
    
    .so-header .secondary-nav .js-site-switcher-button:after
    {
        content: 'network';
    }  
}