https://www.helpnetsecurity.com/2011/09/07/firefox-602-removes-trust-to-diginotar-ca/
Firefox 6.0.2 removes trust to DigiNotar CA - Help Net Security
Sep 7, 2011 - Mozilla released Firefox 6.0.2 that removes trust exceptions for certificates issued by Staat der Nederlanden and therefore offers additional protection
firefox 6 0
https://www.telerik.com/forums/firefox-6-0-1
Firefox 6.0.1 in Test Studio | Telerik Forums
Hi guys, We are using a web app that needs to run on FF 6.0.1. I had the latest version of firefox, where I could record without any problems. ...
firefox 6 0test studio1telerikforums
https://www.tomshardware.com/news/mozilla-firefox-9.0-download-update,14328.html
Firefox 9.0 Download Released; From 3.6 to 9.0 in 2011 | Tom's Hardware
Dec 20, 2011 - Our little Firefox is growing up so fast.