'''REGULAR TAB (not incognito) WITH DNT=1 ENABLED IN FIREFOX SETTINGS AND MANUALLY ENTERED HTTPS = SUCCESSFUL DOWNLOAD'''

GET
	https://down.360safe.com/cse/360cse_9.5.0.122.exe

GET /cse/360cse_9.5.0.122.exe HTTP/1.1
Host: down.360safe.com
User-Agent: Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:92.0) Gecko/20100101 Firefox/92.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
DNT: 1
Connection: keep-alive
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: none
Sec-Fetch-User: ?1

Response:

HTTP/1.1 200 OK
Date: Tue, 28 Sep 2021 06:45:17 GMT
Content-Type: application/octet-stream
Content-Length: 45846432
Connection: keep-alive
Expires: Tue, 28 Sep 2021 06:55:17 GMT
Last-Modified: Fri, 02 Feb 2018 12:20:52 GMT
Cache-Control: max-age=600
ETag: "5a7457a4-2bb8fa0"
KCS-Via: HIT from w-f05.lato;MISS from back-f03.dl.lato;REVALIDATED from w-subsrc01.lato
K-Cache-status: MISS
Accept-Ranges: bytes