Hi. When starting Firefox in a terminal emulator, it complains about libpci missing for glxtest.
According to the source, Firefox dlopens libpci.so.3: https://searchfox.org/mozilla-central/source/toolkit/xre/glxtest.cpp#250 devel/libpci provides this library and installing it resolves the warning. Should this library be added as a runtime dependency for gecko? Note that this was tested on mozilla-central Firefox (hg tagname 9d30cff8f9d48403530819099b36b36f41acb845).