This page is about troubleshooting problems with starting Conkeror or crashes, or other such low level. For problems with content rendering, or unexpected differences between the way a page looks or works in Conkeror versus Firefox, see TroubleshootingContent.
General troubleshooting advice
things like segmentation faults
check the terminal for error messages
run without an rc
try a new profile
try other versions of xulrunner
newest version of conkeror, from git or nightly build, is almost always the best version to run, so see if you need to update.
check BreakingChanges if a problem seemed to appear out of nowhere in your rc after a conkeror update.
Since Conkeror is a purely interpreted program, segfaults will almost always indicate a bug in XULRunner or a problem with its installation like file corruption or mismatched library versions. It could also indicate corruption in your profile. Try the following things: