Using firefox 67.0.1 (64bit) I have not been able to complete an upload test in 5 tries. If I manually select a size (Trying 3 MB) is will fail about 80%. If I let the program select a size it will increate the size till it is about 1.5 to 1.9 MB and fail at 60% to 80%. I can click <Stop> or reset size, enter a new size and it still won't work. If I let it set it will eventually timeout and give an error "... will notify webmaster".