(gdb) run
Starting program: /usr/lib/firefox/firefox
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffea5be700 (LWP 31777)]
[Thread 0x7fffea5be700 (LWP 31777) exited]
[New Thread 0x7fffea5be700 (LWP 31779)]
[New Thread 0x7fffe90bd700 (LWP 31780)]
[New Thread 0x7fffe3e43700 (LWP 31781)]
[New Thread 0x7fffe28ff700 (LWP 31782)]
[New Thread 0x7fffe18e5700 (LWP 31783)]
[New Thread 0x7fffe10e4700 (LWP 31784)]
[New Thread 0x7fffe02ff700 (LWP 31785)]
[New Thread 0x7fffdf4ca700 (LWP 31786)]
[Thread 0x7fffe28ff700 (LWP 31782) exited]
[New Thread 0x7fffe28ff700 (LWP 31787)]
[New Thread 0x7fffdd7ff700 (LWP 31788)]
[New Thread 0x7fffdcffe700 (LWP 31789)]
[New Thread 0x7fffdc7fd700 (LWP 31790)]
[New Thread 0x7fffdc1ff700 (LWP 31791)]
[New Thread 0x7fffdb9fe700 (LWP 31792)]
[Thread 0x7fffdb9fe700 (LWP 31792) exited]
[Thread 0x7fffdd7ff700 (LWP 31788) exited]
[New Thread 0x7fffdd7ff700 (LWP 31793)]
[Thread 0x7fffe28ff700 (LWP 31787) exited]
[Thread 0x7fffdd7ff700 (LWP 31793) exited]
[Thread 0x7fffdc1ff700 (LWP 31791) exited]
[Thread 0x7fffdc7fd700 (LWP 31790) exited]
[Thread 0x7fffdcffe700 (LWP 31789) exited]
[Thread 0x7fffe10e4700 (LWP 31784) exited]
[Thread 0x7fffe18e5700 (LWP 31783) exited]
[Thread 0x7fffe3e43700 (LWP 31781) exited]
[Thread 0x7fffe02ff700 (LWP 31785) exited]
[Thread 0x7fffdf4ca700 (LWP 31786) exited]
[Thread 0x7fffe90bd700 (LWP 31780) exited]
[Thread 0x7fffea5be700 (LWP 31779) exited]
process 31774 is executing new program: /usr/lib/firefox/firefox
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe98be700 (LWP 31795)]
[New Thread 0x7fffe90bd700 (LWP 31796)]
[New Thread 0x7fffe3e43700 (LWP 31797)]
[New Thread 0x7fffe28ff700 (LWP 31798)]
[New Thread 0x7fffe18e5700 (LWP 31799)]
[New Thread 0x7fffe10e4700 (LWP 31800)]
[New Thread 0x7fffe02ff700 (LWP 31801)]
[New Thread 0x7fffdf4ca700 (LWP 31802)]
[New Thread 0x7ffff6b25700 (LWP 31803)]
[New Thread 0x7fffdd7ff700 (LWP 31804)]
[New Thread 0x7fffdcdff700 (LWP 31805)]
[New Thread 0x7fffda4ff700 (LWP 31806)]
[New Thread 0x7fffd9cfe700 (LWP 31807)]
[New Thread 0x7fffd94ff700 (LWP 31808)]
[New Thread 0x7fffd8cff700 (LWP 31809)]
[New Thread 0x7fffd84fe700 (LWP 31810)]
[New Thread 0x7fffe08e3700 (LWP 31811)]
[New Thread 0x7fffdcffe700 (LWP 31812)]
[New Thread 0x7fffd9afd700 (LWP 31813)]
[New Thread 0x7fffd92fe700 (LWP 31814)]
[New Thread 0x7fffd8eff700 (LWP 31815)]
[New Thread 0x7fffd7cfd700 (LWP 31816)]
[New Thread 0x7fffd7c7c700 (LWP 31817)]
[New Thread 0x7fffd7bfb700 (LWP 31818)]
[Thread 0x7fffdcdff700 (LWP 31805) exited]
[New Thread 0x7fffd78ff700 (LWP 31819)]
[New Thread 0x7fffdcdff700 (LWP 31820)]
[New Thread 0x7fffd70fe700 (LWP 31821)]
[New Thread 0x7fffd608d700 (LWP 31822)]
[Thread 0x7fffd70fe700 (LWP 31821) exited]
[Thread 0x7fffd84fe700 (LWP 31810) exited]
[Thread 0x7fffd608d700 (LWP 31822) exited]
[New Thread 0x7fffd608d700 (LWP 31823)]
[Thread 0x7fffdcdff700 (LWP 31820) exited]
[New Thread 0x7fffdcdff700 (LWP 31824)]
[New Thread 0x7fffd70fe700 (LWP 31825)]
[New Thread 0x7fffd84fe700 (LWP 31826)]
[New Thread 0x7fffd48ff700 (LWP 31827)]
[Thread 0x7fffd608d700 (LWP 31823) exited]
[Thread 0x7fffd70fe700 (LWP 31825) exited]
[Thread 0x7fffd84fe700 (LWP 31826) exited]
[New Thread 0x7fffd608d700 (LWP 31828)]
[New Thread 0x7fffd70fe700 (LWP 31831)]
[New Thread 0x7fffd84fe700 (LWP 31832)]
[New Thread 0x7fffd21ff700 (LWP 31833)]
[New Thread 0x7fffd1eff700 (LWP 31834)]
[New Thread 0x7fffd0288700 (LWP 31835)]
[New Thread 0x7fffcfa87700 (LWP 31836)]
[New Thread 0x7fffcebff700 (LWP 31837)]
[New Thread 0x7fffce1ff700 (LWP 31838)]
[New Thread 0x7fffcd7ff700 (LWP 31839)]
[New Thread 0x7fffccdff700 (LWP 31840)]
[Thread 0x7fffdf4ca700 (LWP 31802) exited]
[Thread 0x7fffe28ff700 (LWP 31798) exited]
[Thread 0x7fffd8eff700 (LWP 31815) exited]
[Thread 0x7fffd7c7c700 (LWP 31817) exited]
[Thread 0x7fffdcffe700 (LWP 31812) exited]
[Thread 0x7fffd9cfe700 (LWP 31807) exited]
[Thread 0x7fffe98be700 (LWP 31795) exited]
[Thread 0x7fffdd7ff700 (LWP 31804) exited]
[Thread 0x7fffd7cfd700 (LWP 31816) exited]
[Thread 0x7fffd8cff700 (LWP 31809) exited]
[Thread 0x7fffda4ff700 (LWP 31806) exited]
[Thread 0x7fffd78ff700 (LWP 31819) exited]
[Thread 0x7fffcfa87700 (LWP 31836) exited]
[Thread 0x7fffce1ff700 (LWP 31838) exited]
[Thread 0x7fffd70fe700 (LWP 31831) exited]
[Thread 0x7fffd9afd700 (LWP 31813) exited]
[Thread 0x7fffd94ff700 (LWP 31808) exited]
[Thread 0x7fffccdff700 (LWP 31840) exited]
[Thread 0x7fffd0288700 (LWP 31835) exited]
[Thread 0x7fffd1eff700 (LWP 31834) exited]
[Thread 0x7fffd84fe700 (LWP 31832) exited]
[Thread 0x7fffd21ff700 (LWP 31833) exited]
[Thread 0x7fffd608d700 (LWP 31828) exited]
[Thread 0x7fffdcdff700 (LWP 31824) exited]
[Thread 0x7fffcebff700 (LWP 31837) exited]
[Thread 0x7fffd48ff700 (LWP 31827) exited]
[Thread 0x7fffd7bfb700 (LWP 31818) exited]
[Thread 0x7fffd92fe700 (LWP 31814) exited]
[Thread 0x7fffe08e3700 (LWP 31811) exited]
[Thread 0x7ffff6b25700 (LWP 31803) exited]
[Thread 0x7fffe02ff700 (LWP 31801) exited]
[Thread 0x7fffe10e4700 (LWP 31800) exited]
[Thread 0x7fffe18e5700 (LWP 31799) exited]
[Thread 0x7fffe3e43700 (LWP 31797) exited]
[Thread 0x7fffe90bd700 (LWP 31796) exited]
[Thread 0x7ffff7fcb740 (LWP 31774) exited]

Program terminated with signal SIGKILL, Killed.
The program no longer exists.