diff --git a/nsprpub/TAG-INFO b/nsprpub/TAG-INFO
index 081023c1e0ba..21c774a00756 100644
--- a/nsprpub/TAG-INFO
+++ b/nsprpub/TAG-INFO
@@ -1 +1 @@
-NSPR_4_34_1_RTM
\ No newline at end of file
+NSPR_4_35_BETA1
\ No newline at end of file
diff --git a/nsprpub/config/prdepend.h b/nsprpub/config/prdepend.h
index e49e92677e3e..6c66b37ca0fc 100644
--- a/nsprpub/config/prdepend.h
+++ b/nsprpub/config/prdepend.h
@@ -10,3 +10,4 @@
  */
 
 #error "Do not include this header file."
+
diff --git a/nsprpub/configure b/nsprpub/configure
index 6ad81ac9438d..6343ec7f87a8 100755
--- a/nsprpub/configure
+++ b/nsprpub/configure
@@ -2486,8 +2486,8 @@ test -n "$target_alias" &&
   program_prefix=${target_alias}-
 
 MOD_MAJOR_VERSION=4
-MOD_MINOR_VERSION=34
-MOD_PATCH_VERSION=1
+MOD_MINOR_VERSION=35
+MOD_PATCH_VERSION=0
 NSPR_MODNAME=nspr20
 _HAVE_PTHREADS=
 USE_PTHREADS=
diff --git a/nsprpub/configure.in b/nsprpub/configure.in
index 53ffe3882bd7..7d4446689a82 100644
--- a/nsprpub/configure.in
+++ b/nsprpub/configure.in
@@ -15,8 +15,8 @@ dnl ========================================================
 dnl = Defaults
 dnl ========================================================
 MOD_MAJOR_VERSION=4
-MOD_MINOR_VERSION=34
-MOD_PATCH_VERSION=1
+MOD_MINOR_VERSION=35
+MOD_PATCH_VERSION=0
 NSPR_MODNAME=nspr20
 _HAVE_PTHREADS=
 USE_PTHREADS=
diff --git a/nsprpub/pr/include/md/_linux.cfg b/nsprpub/pr/include/md/_linux.cfg
index 23b160fde28d..2232820afeae 100644
--- a/nsprpub/pr/include/md/_linux.cfg
+++ b/nsprpub/pr/include/md/_linux.cfg
@@ -499,7 +499,7 @@
 #elif defined(__mips__)
 
 /* For _ABI64 */
-#include <sgidefs.h>
+#include <asm/sgidefs.h>
 
 #ifdef __MIPSEB__
 #define IS_BIG_ENDIAN 1
@@ -1255,6 +1255,52 @@
 #define PR_BYTES_PER_WORD_LOG2  3
 #define PR_BYTES_PER_DWORD_LOG2 3
 
+#elif defined(__loongarch64)
+
+#undef  IS_BIG_ENDIAN
+#define IS_LITTLE_ENDIAN 1
+#define IS_64
+
+#define PR_BYTES_PER_BYTE   1
+#define PR_BYTES_PER_SHORT  2
+#define PR_BYTES_PER_INT    4
+#define PR_BYTES_PER_INT64  8
+#define PR_BYTES_PER_LONG   8
+#define PR_BYTES_PER_FLOAT  4
+#define PR_BYTES_PER_DOUBLE 8
+#define PR_BYTES_PER_WORD   8
+#define PR_BYTES_PER_DWORD  8
+
+#define PR_BITS_PER_BYTE    8
+#define PR_BITS_PER_SHORT   16
+#define PR_BITS_PER_INT     32
+#define PR_BITS_PER_INT64   64
+#define PR_BITS_PER_LONG    64
+#define PR_BITS_PER_FLOAT   32
+#define PR_BITS_PER_DOUBLE  64
+#define PR_BITS_PER_WORD    64
+
+#define PR_BITS_PER_BYTE_LOG2   3
+#define PR_BITS_PER_SHORT_LOG2  4
+#define PR_BITS_PER_INT_LOG2    5
+#define PR_BITS_PER_INT64_LOG2  6
+#define PR_BITS_PER_LONG_LOG2   6
+#define PR_BITS_PER_FLOAT_LOG2  5
+#define PR_BITS_PER_DOUBLE_LOG2 6
+#define PR_BITS_PER_WORD_LOG2   6
+
+#define PR_ALIGN_OF_SHORT   2
+#define PR_ALIGN_OF_INT     4
+#define PR_ALIGN_OF_LONG    8
+#define PR_ALIGN_OF_INT64   8
+#define PR_ALIGN_OF_FLOAT   4
+#define PR_ALIGN_OF_DOUBLE  8
+#define PR_ALIGN_OF_POINTER 8
+#define PR_ALIGN_OF_WORD    8
+
+#define PR_BYTES_PER_WORD_LOG2  3
+#define PR_BYTES_PER_DWORD_LOG2 3
+
 #else
 
 #error "Unknown CPU architecture"
diff --git a/nsprpub/pr/include/md/_linux.h b/nsprpub/pr/include/md/_linux.h
index a26291a8062c..ad57d083301c 100644
--- a/nsprpub/pr/include/md/_linux.h
+++ b/nsprpub/pr/include/md/_linux.h
@@ -73,6 +73,8 @@
 #define _PR_SI_ARCHITECTURE "nds32"
 #elif defined(__xtensa__)
 #define _PR_SI_ARCHITECTURE "xtensa"
+#elif defined(__loongarch64)
+#define _PR_SI_ARCHITECTURE "loongarch64"
 #else
 #error "Unknown CPU architecture"
 #endif
@@ -141,6 +143,18 @@ extern PRInt32 _PR_x86_64_AtomicSet(PRInt32 *val, PRInt32 newval);
 #define _MD_ATOMIC_SET                _PR_x86_64_AtomicSet
 #endif
 
+#if defined(__loongarch__)
+#if defined(__GNUC__)
+/* Use GCC built-in functions */
+#define _PR_HAVE_ATOMIC_OPS
+#define _MD_INIT_ATOMIC()
+#define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
+#define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
+#define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
+#define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
+#endif
+#endif
+
 #if defined(__or1k__)
 #if defined(__GNUC__)
 /* Use GCC built-in functions */
diff --git a/nsprpub/pr/include/prinit.h b/nsprpub/pr/include/prinit.h
index c1b9905174d2..ddb7ac44a3f3 100644
--- a/nsprpub/pr/include/prinit.h
+++ b/nsprpub/pr/include/prinit.h
@@ -31,11 +31,11 @@ PR_BEGIN_EXTERN_C
 ** The format of the version string is
 **     "<major version>.<minor version>[.<patch level>] [<Beta>]"
 */
-#define PR_VERSION  "4.34.1"
+#define PR_VERSION  "4.35 Beta"
 #define PR_VMAJOR   4
-#define PR_VMINOR   34
-#define PR_VPATCH   1
-#define PR_BETA     PR_FALSE
+#define PR_VMINOR   35
+#define PR_VPATCH   0
+#define PR_BETA     PR_TRUE
 
 /*
 ** PRVersionCheck
diff --git a/nsprpub/pr/src/io/prsocket.c b/nsprpub/pr/src/io/prsocket.c
index e0f917c16a6b..4ca2bad8f2e8 100644
--- a/nsprpub/pr/src/io/prsocket.c
+++ b/nsprpub/pr/src/io/prsocket.c
@@ -322,7 +322,7 @@ static PRStatus PR_CALLBACK SocketConnectContinue(
 #if defined(_WIN64)
             if (fd->secret->overlappedActive) {
                 PRInt32 rvSent;
-                if (GetOverlappedResult(osfd, &fd->secret->ol, &rvSent, FALSE) == FALSE) {
+                if (GetOverlappedResult((HANDLE)osfd, &fd->secret->ol, &rvSent, FALSE) == FALSE) {
                     err = WSAGetLastError();
                     PR_LOG(_pr_io_lm, PR_LOG_MIN,
                            ("SocketConnectContinue GetOverlappedResult failed %d\n", err));
@@ -354,7 +354,7 @@ static PRStatus PR_CALLBACK SocketConnectContinue(
     if (fd->secret->overlappedActive) {
         PR_ASSERT(fd->secret->nonblocking);
         PRInt32 rvSent;
-        if (GetOverlappedResult(osfd, &fd->secret->ol, &rvSent, FALSE) == TRUE) {
+        if (GetOverlappedResult((HANDLE)osfd, &fd->secret->ol, &rvSent, FALSE) == TRUE) {
             fd->secret->overlappedActive = PR_FALSE;
             PR_LOG(_pr_io_lm, PR_LOG_MIN,
                    ("SocketConnectContinue GetOverlappedResult succeeded\n"));
diff --git a/nsprpub/pr/src/md/unix/unix.c b/nsprpub/pr/src/md/unix/unix.c
index f71d1f66a1dd..70bb8e8744f9 100644
--- a/nsprpub/pr/src/md/unix/unix.c
+++ b/nsprpub/pr/src/md/unix/unix.c
@@ -2755,8 +2755,8 @@ static void _PR_InitIOV(void)
     _md_iovector._mmap64 = mmap64;
 #if (defined(ANDROID) && __ANDROID_API__ < 21)
     /* Same as the open64 case for Android. */
-    _md_iovector._fstat64 = fstat;
-    _md_iovector._stat64 = stat;
+    _md_iovector._fstat64 = (_MD_Fstat64)fstat;
+    _md_iovector._stat64 = (_MD_Stat64)stat;
 #else
     _md_iovector._fstat64 = fstat64;
     _md_iovector._stat64 = stat64;
diff --git a/nsprpub/pr/src/md/windows/w95sock.c b/nsprpub/pr/src/md/windows/w95sock.c
index 5aff369be4b9..abe462fe0219 100644
--- a/nsprpub/pr/src/md/windows/w95sock.c
+++ b/nsprpub/pr/src/md/windows/w95sock.c
@@ -491,7 +491,7 @@ _PR_MD_TCPSENDTO(PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags,
             if ( rv < 0 ) {
                 return -1;
             }
-            rv = GetOverlappedResult(osfd, &fd->secret->ol, &rvSent, FALSE);
+            rv = GetOverlappedResult((HANDLE)osfd, &fd->secret->ol, &rvSent, FALSE);
             if ( rv == TRUE ) {
                 return rvSent;
             } else {
diff --git a/nsprpub/pr/src/misc/prsystem.c b/nsprpub/pr/src/misc/prsystem.c
index 109f1ed23f95..dba093e9b17d 100644
--- a/nsprpub/pr/src/misc/prsystem.c
+++ b/nsprpub/pr/src/misc/prsystem.c
@@ -206,7 +206,11 @@ PR_IMPLEMENT(PRInt32) PR_GetNumberOfProcessors( void )
     size_t len = sizeof(numCpus);
 
     mib[0] = CTL_HW;
+#ifdef HW_NCPUONLINE
+    mib[1] = HW_NCPUONLINE;
+#else
     mib[1] = HW_NCPU;
+#endif
     rc = sysctl( mib, 2, &numCpus, &len, NULL, 0 );
     if ( -1 == rc )  {
         numCpus = -1; /* set to -1 for return value on error */
diff --git a/nsprpub/pr/tests/vercheck.c b/nsprpub/pr/tests/vercheck.c
index 35a922a96600..95bda45292c7 100644
--- a/nsprpub/pr/tests/vercheck.c
+++ b/nsprpub/pr/tests/vercheck.c
@@ -58,8 +58,8 @@ static char *incompatible_version[] = {
     "3.0", "3.0.1",
     "3.1", "3.1.1", "3.1.2", "3.1.3",
     "3.5", "3.5.1",
-    "4.34.2",
-    "4.35", "4.35.1",
+    "4.35.1",
+    "4.36", "4.36.1",
     "10.0", "11.1", "12.14.20"
 };