firefox - What do these numbers in brackets in the 'received' column mean in httpfox? -

in httpfox can see numbers in pair of brackets in received column.

it happens not traffic.

what significance of it?

this column whole represents number of bytes received request.

requests fulfilled cache, rather being downloaded again, shown in parenthesis. numbers in parenthesis number of bytes loaded cache.

you can see http status code requests received 304 meaning content hasn't changed , browser should load cache rather downloading file again.