I recently came to know that, none of the websites are reporting "Content-Length" in response headers, is it important? . Is there any setting to make it appear in response headers.
from the official definition: https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.13
"Applications SHOULD use this field to indicate the transfer-length of the message-body"
"In HTTP, it SHOULD be sent whenever the message's length can be determined prior to being transferred"