Firefox, Images and Myterious Gaps

Scenario:

• You are using tables


• You are using firefox


• You are using <img> element to inside table


• And firefox is setting extra white space below the image in table cell

Example:

This happens when you have Strict doc type declaration.

Quick Fix:
Apply style to that image. display: block
Ex: td img {
display: block;
}
or
.image {
display: block;
}

Reference: mozilla developer center