Perhaps it's because I'm using the 32-bit version of Pale Moon on my Win 7 64-bit computer, but I simply haven't had problems with downloading files of any size with DSB. I don't even think about it, that's how unproblematic my experience has been. (For a while, I had both the 32-bit and the 64-bit version of Pale Moon on the computer, using the 64-bit except when some software wanted the 32-bit. I finally decided it was silly to have both, and I chose to keep the 32-bit, but I don't recall encountering any download problems while I was using the 64-bit version.)