Porteus

Thanks for your work! Is it possible with my own hand in the 002-firefox.xzm module to replace the old version of Firefox ESR 52.9.0 with the standard latest version or can I use a separate module for example firefox.zxm? There are sites that display correctly only in the latest versions. When to expect the release of a new version of PK with fresh Firefox?

I am new to Porteus, but I believe that you can download the latest version of Firefox from the official website, and use Porteus Modules (under the system tab in the menu) to covert this to a .zxm module. Then you would have to move the module to porteus/modules/ and activate it.
I hope this helps.