diff --git a/srcpkgs/firefox/patches/sandbox-fork.patch b/srcpkgs/firefox/patches/sandbox-fork.patch
new file mode 100644
index 00000000000..72640cb7f70
--- /dev/null
+++ b/srcpkgs/firefox/patches/sandbox-fork.patch
@@ -0,0 +1,13 @@
+make SYS_fork non-fatal, musl uses it for fork(2)
+
+--- security/sandbox/linux/SandboxFilter.cpp
++++ security/sandbox/linux/SandboxFilter.cpp
+@@ -1253,6 +1253,8 @@
+         // usually do something reasonable on error.
+       case __NR_clone:
+         return ClonePolicy(Error(EPERM));
++      case __NR_fork:
++        return Error(ENOSYS);
+ 
+ #  ifdef __NR_fadvise64
+       case __NR_fadvise64:
diff --git a/srcpkgs/firefox/template b/srcpkgs/firefox/template
index 801e503b3a4..24d71479b77 100644
--- a/srcpkgs/firefox/template
+++ b/srcpkgs/firefox/template
@@ -4,7 +4,7 @@
 #
 pkgname=firefox
 version=75.0
-revision=1
+revision=2
 build_helper="rust"
 short_desc="Mozilla Firefox web browser"
 maintainer="Johannes <johannes.brechtmann@gmail.com>"