Hey, saw this on the add-on detail pages. It looks like the new nightlies have resizable textareas, but when resizing the review box it sizes from the wrong side and overflows the div area. I'm not sure if this is our fault or the new Firefox code, or something we can have a designer look at or what. Since it's on the add-on detail page, giving this to fred as a P5 to investigate if he has time.
Sounds like they are actively fixing bugs with this, so probably not worth looking at this for now.
In fact, meh