That looks like a different website and I had the web address bookmarked as https://populist.press
The website needs to fix the spacing of the text in Firefox.
The underline overlaps the next text line below it.
In Chrome it looks ok and IE wanted to run a plugin called MS helper.
Using Firefox’s Inspect Element (right click)
.spacing-tight .posts-list li.the-content .image-wrap, .spacing-tight .posts-list li.the-content .headline-link, .spacing-tight .posts-list li.the-content .post-date