+--- firefox-81.0.1/security/sandbox/linux/SandboxFilter.cpp.orig 2020-09-30 19:41:50.000000000 +0200
++++ firefox-81.0.1/security/sandbox/linux/SandboxFilter.cpp 2020-10-04 20:11:32.552050641 +0200
+@@ -479,7 +479,13 @@
+
+ switch (sysno) {
+ // Timekeeping
++#ifdef __NR_clock_nanosleep_time64
++ case __NR_clock_nanosleep_time64:
++#endif
+ case __NR_clock_nanosleep:
++#ifdef __NR_clock_nanosleep_time64
++ case __NR_clock_getres_time64:
++#endif
+ case __NR_clock_getres:
+ #ifdef __NR_clock_gettime64
+ case __NR_clock_gettime64:
+@@ -513,6 +519,9 @@
+ return Allow();
+
+ // Thread synchronization
++#ifdef __NR_futex_time64
++ case __NR_futex_time64:
++#endif
+ case __NR_futex:
+ // FIXME: This could be more restrictive....
+ return Allow();
+@@ -523,6 +532,9 @@
+ case __NR_epoll_wait:
+ case __NR_epoll_pwait:
+ case __NR_epoll_ctl:
++#ifdef __NR_ppoll_time64
++ case __NR_ppoll_time64:
++#endif
+ case __NR_ppoll:
+ case __NR_poll:
+ return Allow();
+@@ -1095,6 +1107,9 @@
+ #endif
+
+ CASES_FOR_select:
++#ifdef __NR_pselect6_time64
++ case __NR_pselect6_time64:
++#endif
+ case __NR_pselect6:
+ return Allow();
+