How to get Firefox 48.0.2 / Firefox 45.9.x ESR to work on Windows XP RTM!

How to get Firefox 48.0.2 / Firefox 45.9.x ESR to work on Windows XP RTM!

You MUST have 7-Zip and CFF Explorer installed!

To start, right click on the Firefox Setup 48.0.2.exe, and then open archive with 7-Zip.

Extract the firefox files in the core folder to C:\.

Right click on the kernelxp.7z file, and then open archive with 7-Zip.

Extract the files to C:\Firefox\.

Run "patchk32.bat" to start patching files.

Once all done with these steps above, delete the following files,

gsar.exe, patchk32.bat

...BUT KERNELXP.DLL MUST STAY IN THE MYPAL FOLDER OR ELSE IT WILL NOT WORK!

Right click on firefox.exe, and then create a desktop shortcut to it and then rename it to "Mozilla Firefox".

Make sure you turn off automatic updates for Mozilla Firefox, because Firefox due to the system's limitations for Windows XP RTM, Firefox 49-52 is still startable on Windows XP RTM, but it crashes within seconds.

And then Firefox 48.0.2 works on Windows XP RTM!

Original source and license: https://ftp.mozilla.org/pub/firefox/releases/48.0.2/win32/en-US/Firefox%20Setup%2048.0.2.exe

kernelxp.dll wrappers by roytam1 (MSFN): http://o.rthost.win/gpc/files1.rt/kernelxp.7z

7-Zip: https://7-zip.org/

Explorer Suite: https://ntcore.com/explorer-suite/

This guide is intended for educational and compatibility research purposes only. It does not redistribute or modify the official Firefox 48.0.2 source code, nor does it alter any Mozilla licensing terms. All credit for the kernelxp.dll compatibility wrappers belongs to roytam1 (MSFN). Firefox is a registered trademark of the Mozilla Foundation. Use this information at your own risk. This setup is not supported by Mozilla and is meant solely for legacy system preservation and testing.