Ok so here's the issue. I'm creating a block-grid that uses the display:inline-block property. It works as expected on all browsers and ESP's. However, I'm noticing a padding issue only in Firefox. I've been adding all sorts of tricks like border-collapse: collapse; mso-table-lspace:0 mso-table-rspace:0;. Because it's display:inline-block I also know that each <td> need needs to have no whitespace between them.

I've minified and inlined the HTML and you can see the results here: https://litmus.com/builder/a1f1c41

When testing locally on Firefox, I can replicate the error by not minifying the HTML.

So! My question, has anyone else had this issue or have work arounds for this?