Opt out of Windows updates or Firefox...... As for that info can not remember back that far as to where it is....names/locations have all changed. Look for Never Update.

fyi : you are using a unsupported browser that is a security risk and hackable. Most people on XP are running the ESR Version. 52.5.0 ESR is secure. It will continue to get security updates until May 2018, and you can download and install it from this page: https://www.mozilla.org/en-US/firefox/organizations/all/ Note : Legacy Extensions will be deleted or removed in any version update after May 2018.

You should make a backup of your Profile before going back and just because: https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

Please let us know if this solved your issue or if need further assistance.

Firefox 53.0 and later dropped support for WinXP and Vista as you need Windows 7 or later.

Firefox 52 ESR is your only real option to still get Firefox updates for the old EOL WinXP.

Will update to 52 and hope for best. I may be going out on a limb, but I bet there are a heck of lot more computers out there running XP then they might think. Not everyone can afford a new computer to run the 7 up systems.

xpwindows said

Will update to 52 and hope for best. I may be going out on a limb, but I bet there are a heck of lot more computers out there running XP then they might think. Not everyone can afford a new computer to run the 7 up systems.

By the time Firefox 52.8.0 ESR is Released May 8, 2018 along with Firefox 60, Mozilla will have supported WinXP/Vista for two years since Chrome/Chromium (and bit later Opera) dropped WinXP/Vista support in April 2016.

Oh Mozilla keeps track of OS and hardware used. However WinXP/Vista is on Firefox 52 ESR now. https://hardware.metrics.mozilla.com/

Windows XP was officially made EOL in April 2014 and Vista in April 2017 by Microsoft. Those hacks to get WinXP updates meant for atms and cashiers are and such is not really still support.

There are complications in still supporting WInXP. From the tracking "Bug 1130266 (xp-eol) Remove support for Windows XP/Vista" for reading.

Jim Mathies [:jimm] comment 16 (Sept 29, 2016) Supporting XP is actually become quite a problem for our releng teams in that data center testing hardware doesn't support XP anymore. So for example we currently use AWS for most of our testing, but have XP tests running on old hardware we have to maintain ourselves in a data center. It's issues like this that push us to move XP out to an extended support release where we can decommission most of our automated testing associated with it.

. . You can try dual booting with a Linux distro with a light desktop environment like Xfce or lighter as Gnome3 and KDE is heavy as Xubuntu is one of the options. This way you can be more secure OS wise and use current versions of Firefox. Problem is many Linux distros have been dropping 32-bit CPU support in favour of 64-bit.