=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
Content-Length: 418816
Connection: close
amo-request-id: 6a37f42d-2ced-457e-9df4-9f9ac75299bb
Cache-Control: max-age=0
Cache-Control: s-maxage=180
Content-Security-Policy: default-src 'none';base-uri 'self';child-src 'none';connect-src https://www.google-analytics.com https://addons.mozilla.org;font-src https://addons.mozilla.org/static-frontend/;form-action 'self';frame-src 'none';img-src 'self' data: https://addons.mozilla.org/user-media/ https://addons.mozilla.org/static-frontend/ https://addons.mozilla.org/static-server/ https://addons.cdn.mozilla.net/;manifest-src 'none';media-src 'none';object-src 'none';script-src https://addons.mozilla.org/static-frontend/ https://www.google-analytics.com/analytics.js;style-src https://addons.mozilla.org/static-frontend/;worker-src 'none';report-uri /__cspreport__
Date: Fri, 03 Dec 2021 05:15:37 GMT
ETag: W/&quot;66400-wP55wtjOK6GWOHeRKVsDw9TdPgU&quot;
Public-Key-Pins: max-age=5184000; includeSubDomains; pin-sha256=&quot;WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18=&quot;; pin-sha256=&quot;r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E=&quot;
Strict-Transport-Security: max-age=31536000
X-Content-Type-Options: nosniff
X-Frame-Options: DENY
X-XSS-Protection: 0
Vary: Accept-Encoding,DNT,User-Agent,Accept-Encoding
X-Cache: Miss from cloudfront
Via: 1.1 4c88cf886add957cd777a3b7eec7de7c.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: NRT20-C1
X-Amz-Cf-Id: sbv71eJVI_c3rDgOm_7TjtwOifDVVNIRxiYThfzxnvtxEFbmNjyyOg==

Request headers
================
HEAD /en-US/firefox/ HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: addons.mozilla.org
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.