Not what you are looking for? Ask the experts!
New Firefox 53.0.3
A New Firefox 53.0.3 will be released later today 19 May 2017 to get when released click on help>about Firefox>check for updates Release notes
Fix hangs when using a proxy with NTLM authentication (bug 1360574)
Fix excessive resource usage from the captive portal detection service (bug 1359697)