.img-responsive class breaks table with fixed widths in FF
Created by: bassjobsen
See: http://jsfiddle.net/cctyb/ (original: http://stackoverflow.com/questions/18846744/responsive-images-in-tables-bootstrap-3/1885903).
Possible solution seems add:
.table .img-responsive{width:100%}
to the css / less, see: http://stackoverflow.com/questions/2923710/why-do-firefox-and-opera-ignore-max-width-inside-of-display-table-cell