''build'' command just compiles everything. ''install'' command installs Firefox on local machine (for all users). ''package'' command creates an isolated all-in-one archive from which Firefox can be run (including all libraries, at least that what I think it is). I don't know what ''artifact'' command does, but I think it's not it. Is there any command that can produce .deb file (which can be easily installed in one command)? My only hope right now is to copy whatever ''mach install'' is doing (all necessary folders etc.) and bundle everything in a custom archive. The main problem is the ginormous size of 32 GiB after build is complete. (I can't archive that and use as a portable installer/builder, which indeed would be very convenient but the size…)