How can I get FF 33.x Flexbox behavior in FF 34.x?

Question

We use flexbox heavily for an desktop application like looking web app and it has been working out great.

But with the latest Firefox Developer Edition (35.0a2) the

Answer 1

none of these fixes worked for me, even though they work. In my case, I was supplying a display: table-cell fallback, which seemed to be taking over. Using SASS, including it like this, the fallback works for IE without affecting FF:

flex: auto; // or whatever   
.ie & {
  display: table-cell;
}