I need Firefox_ESR 52.9 which is the last release that supports an add-on I need for a standalone application (i.e NO INTERNET) to run on 32bit and 64bit Debian Bullseye Raspberry Pi. I don't know if it can be done but I want to try and see if I can build it. I downloaded the source. I'd like to consult with documentation first but the README.txt file points to two pages that don't exist anymore: https://developer.mozilla.org/en/Mozilla_Source_Code_Directory_Structure http://developer.mozilla.org/en/docs/Build_Documentation If anyone can provide me with the documentation from their way-back machine and/or assist me, I'd be very appreciative. The application needs the original mkiosk add-on (not the current one) and this is the last Firefox revision to support it. The application is something I provided to our museum and I wrote the hundred+ web pages for it but it was written for wheezy, not bullseye and I want to run it on an RPI4 instead. I donated hundreds of hours of work as well as all the hardware (including a touchscreen monitor) to the museum. I have no intention of otherwise using the application except for similar projects or selling it for any reason whatsoever. Actually, what would be more wonderful if someone had ported that mkiosk version to current Firefox. It has some unique features. All my work on this, and other applications I have written, have been freely donated and, at my age, I don't intend to change that policy.