diff --git a/ext/fts5/tool/mkfts5c.tcl b/ext/fts5/tool/mkfts5c.tcl
index b1a55fa4ae..9ea34a01e2 100644
--- a/ext/fts5/tool/mkfts5c.tcl
+++ b/ext/fts5/tool/mkfts5c.tcl
@@ -23,7 +23,27 @@ set G(src) [string map [list %dir% $srcdir] {
 }]
 
 set G(hdr) {
-
+/*
+** This, the "fts5.c" source file, is a composite file that is itself
+** assembled from the following files:
+**
+**    fts5.h
+**    fts5Int.h
+**    fts5parse.h          <--- Generated from fts5parse.y by Lemon
+**    fts5parse.c          <--- Generated from fts5parse.y by Lemon
+**    fts5_aux.c
+**    fts5_buffer.c
+**    fts5_config.c
+**    fts5_expr.c
+**    fts5_hash.c
+**    fts5_index.c
+**    fts5_main.c
+**    fts5_storage.c
+**    fts5_tokenize.c
+**    fts5_unicode2.c
+**    fts5_varint.c
+**    fts5_vocab.c
+*/
 #if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS5) 
 
 #if !defined(NDEBUG) && !defined(SQLITE_DEBUG) 
@@ -33,10 +53,16 @@ set G(hdr) {
 # undef NDEBUG
 #endif
 
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#ifdef HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
 }
 
 set G(footer) {
-    
+/* Here ends the fts5.c composite file. */
 #endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS5) */
 }
 
diff --git a/manifest b/manifest
index 56d3ed22cf..93535271ed 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C If\sa\ssubquery\sis\scopied\sand\sthen\schanges\sare\smade\sto\sthe\scopy,\sbe\ssure\nto\sgive\sthe\scopy\sa\sunique\sSelect.selId\svalue\sso\sthat\sthe\soriginal\swill\nnot\sbe\ssubstituted\sin\splace\sof\sthe\smodified\scopy.
-D 2024-11-20T15:02:34.608
+C Cherrypick\sa\scouple\sof\schanges\srequested\sby\sMozilla\sonto\sthe\s3.47\sbranch.
+D 2024-11-20T21:45:25.220
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -258,7 +258,7 @@ F ext/fts5/test/fts5vocab2.test bbba149c254375d00055930c1a501c9a51e80b0d20bf7b98
 F ext/fts5/tool/fts5speed.tcl b0056f91a55b2d1a3684ec05729de92b042e2f85
 F ext/fts5/tool/fts5txt2db.tcl c0d43c8590656f8240e622b00957b3a0facc49482411a9fdc2870b45c0c82f9f
 F ext/fts5/tool/loadfts5.tcl 95b03429ee6b138645703c6ca192c3ac96eaf093
-F ext/fts5/tool/mkfts5c.tcl 3eba8e9bee4221ed165f3304b51b2a74a705f4ec5df3d044573a2be539534af8
+F ext/fts5/tool/mkfts5c.tcl 6649ed963a9135e36866f7cc9f8de5c8dcec85b5df089388274cee6381702cb7
 F ext/fts5/tool/showfts5.tcl d54da0e067306663e2d5d523965ca487698e722c
 F ext/icu/README.txt 7ab7ced8ae78e3a645b57e78570ff589d4c672b71370f5aa9e1cd7024f400fc9
 F ext/icu/icu.c 3add8197e0a86c1761771a39500ebae749438bcf1836160b407a56b4eaa8721c
@@ -756,10 +756,10 @@ F src/os.h 1ff5ae51d339d0e30d8a9d814f4b8f8e448169304d83a7ed9db66a65732f3e63
 F src/os_common.h 6c0eb8dd40ef3e12fe585a13e709710267a258e2c8dd1c40b1948a1d14582e06
 F src/os_kv.c 4d39e1f1c180b11162c6dc4aa8ad34053873a639bac6baae23272fc03349986a
 F src/os_setup.h 6011ad7af5db4e05155f385eb3a9b4470688de6f65d6166b8956e58a3d872107
-F src/os_unix.c 14d0f80e4779f5f76bcc71e7af97e3efe318fa3d0b22335623c59fab7d39302b
-F src/os_win.c 6ff43bac175bd9ed79e7c0f96840b139f2f51d01689a638fd05128becf94908a
+F src/os_unix.c 0ad4e0885294b3a0e135a18533590ec9ad91ffe82f6a08e55b40babd51772928
+F src/os_win.c 69fa1aaff68270423c85cff4327ba17ef99a1eb017e1a2bfb97416d9b8398b05
 F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
-F src/pager.c b08600ebf0db90b6d1e9b8b6577c6fa3877cbe1a100bd0b2899e4c6e9adad4b3
+F src/pager.c d57287cd0864c88740d20618e5e595b144b85bfdaefccafd353d596f254a7b35
 F src/pager.h 4b1140d691860de0be1347474c51fee07d5420bd7f802d38cbab8ea4ab9f538a
 F src/parse.y a7a8d42eeff01d267444ddb476029b0b1726fb70ae3d77984140f17ad02e2d61
 F src/pcache.c 588cc3c5ccaaadde689ed35ce5c5c891a1f7b1f4d1f56f6cf0143b74d8ee6484
@@ -774,7 +774,7 @@ F src/resolve.c c8a5372b97b2a2e972a280676f06ddb5b74e885d3b1f5ce383f839907b57ef68
 F src/rowset.c 8432130e6c344b3401a8874c3cb49fefe6873fec593294de077afea2dce5ec97
 F src/select.c 4b14337a2742f0c0beeba490e9a05507e9b4b12184b9cd12773501d08d48e3fe
 F src/shell.c.in 0662f9bcf0725461778d0254a06150e5d61c08c5a87a7281ccdf45552050c79d
-F src/sqlite.h.in add9e064d6b42af8f1a4a3322bddadec76696e520aedebd83e0d3211c15ac999
+F src/sqlite.h.in 29fc900a58f394c7488d093fd7a8dcb14d3fa6399d5178cb20adcf88dbedfe39
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 3f046c04ea3595d6bfda99b781926b17e672fd6d27da2ba6d8d8fc39981dcb54
 F src/sqliteInt.h baae24292817e13e7fe748851c62efc381dcc4dac241b1182eac3d2f05eae52c
@@ -2221,9 +2221,10 @@ F vsixtest/vsixtest.tcl 6195aba1f12a5e10efc2b8c0009532167be5e301abe5b31385638080
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P cb5ddebf79f824672045cbc660ffc896e82a769e1312ab5925d334ce1e7036dd
-Q +19d1bede5654bcfa9f7a151b9b2616a3d10873b8e3f8cf54a3a7e810da08f844
-R 8774b75a34818556304d8661d7ff9a7e
+P 16d46e116086948a704c03b7b6aecbb2c66cefca4418e8e5a9ffd05e0036c7d1
+Q +1bf8daeb24142044e1b5d4b205317c42353004643fadb6b34f9ae6bfa4e3a6bc
+Q +6e7d498cda1d8fa76f3efac0ee0540dd8241db75e85b863097cab2ed530aabb0
+R d9a0ed242e8b3bbc93132bdf8f6f8664
 U drh
-Z 4b926c2364b383843c0449364f5eacbf
+Z 0e8456cccaab0df334da9037da855ce5
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 30088e3304..5b6946ddd3 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-16d46e116086948a704c03b7b6aecbb2c66cefca4418e8e5a9ffd05e0036c7d1
+b50d20d7951311f1fbf37b228687990f515d2d5189d5c4892b771081298e0af5
diff --git a/src/os_unix.c b/src/os_unix.c
index f71fa8e029..c13c5cece0 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -4128,6 +4128,7 @@ static void setDeviceCharacteristics(unixFile *pFd){
     if( pFd->ctrlFlags & UNIXFILE_PSOW ){
       pFd->deviceCharacteristics |= SQLITE_IOCAP_POWERSAFE_OVERWRITE;
     }
+    pFd->deviceCharacteristics |= SQLITE_IOCAP_SUBPAGE_READ;
 
     pFd->sectorSize = SQLITE_DEFAULT_SECTOR_SIZE;
   }
diff --git a/src/os_win.c b/src/os_win.c
index 442c108e9d..97743412e9 100644
--- a/src/os_win.c
+++ b/src/os_win.c
@@ -3660,7 +3660,7 @@ static int winSectorSize(sqlite3_file *id){
 */
 static int winDeviceCharacteristics(sqlite3_file *id){
   winFile *p = (winFile*)id;
-  return SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN |
+  return SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN | SQLITE_IOCAP_SUBPAGE_READ |
          ((p->ctrlFlags & WINFILE_PSOW)?SQLITE_IOCAP_POWERSAFE_OVERWRITE:0);
 }
 
diff --git a/src/pager.c b/src/pager.c
index 1ac858a070..baaf4afbfe 100644
--- a/src/pager.c
+++ b/src/pager.c
@@ -808,18 +808,26 @@ static const unsigned char aJournalMagic[] = {
 ** Return true if page pgno can be read directly from the database file
 ** by the b-tree layer. This is the case if:
 **
-**   * the database file is open,
-**   * there are no dirty pages in the cache, and
-**   * the desired page is not currently in the wal file.
+**   (1)  the database file is open
+**   (2)  the VFS for the database is able to do unaligned sub-page reads
+**   (3)  there are no dirty pages in the cache, and
+**   (4)  the desired page is not currently in the wal file.
 */
 int sqlite3PagerDirectReadOk(Pager *pPager, Pgno pgno){
-  if( pPager->fd->pMethods==0 ) return 0;
-  if( sqlite3PCacheIsDirty(pPager->pPCache) ) return 0;
+  assert( pPager!=0 );
+  assert( pPager->fd!=0 );
+  if( pPager->fd->pMethods==0 ) return 0;  /* Case (1) */
+  assert( pPager->fd->pMethods->xDeviceCharacteristics!=0 );
+  if( (pPager->fd->pMethods->xDeviceCharacteristics(pPager->fd)
+        & SQLITE_IOCAP_SUBPAGE_READ)==0 ){
+    return 0; /* Case (2) */
+  }
+  if( sqlite3PCacheIsDirty(pPager->pPCache) ) return 0; /* Failed (3) */
 #ifndef SQLITE_OMIT_WAL
   if( pPager->pWal ){
     u32 iRead = 0;
     (void)sqlite3WalFindFrame(pPager->pWal, pgno, &iRead);
-    return iRead==0;
+    return iRead==0; /* Condition (4) */
   }
 #endif
   return 1;
diff --git a/src/sqlite.h.in b/src/sqlite.h.in
index 7097e6bb55..f91088a772 100644
--- a/src/sqlite.h.in
+++ b/src/sqlite.h.in
@@ -652,6 +652,13 @@ int sqlite3_exec(
 ** filesystem supports doing multiple write operations atomically when those
 ** write operations are bracketed by [SQLITE_FCNTL_BEGIN_ATOMIC_WRITE] and
 ** [SQLITE_FCNTL_COMMIT_ATOMIC_WRITE].
+**
+** The SQLITE_IOCAP_SUBPAGE_READ property means that it is ok to read
+** from the database file in amounts that are not a multiple of the
+** page size and that do not begin at a page boundary.  Without this
+** property, SQLite is careful to only do full-page reads and write
+** on aligned pages, with the one exception that it will do a sub-page
+** read of the first page to access the database header.
 */
 #define SQLITE_IOCAP_ATOMIC                 0x00000001
 #define SQLITE_IOCAP_ATOMIC512              0x00000002
@@ -668,6 +675,7 @@ int sqlite3_exec(
 #define SQLITE_IOCAP_POWERSAFE_OVERWRITE    0x00001000
 #define SQLITE_IOCAP_IMMUTABLE              0x00002000
 #define SQLITE_IOCAP_BATCH_ATOMIC           0x00004000
+#define SQLITE_IOCAP_SUBPAGE_READ           0x00008000
 
 /*
 ** CAPI3REF: File Locking Levels
@@ -814,6 +822,7 @@ struct sqlite3_file {
 ** <li> [SQLITE_IOCAP_POWERSAFE_OVERWRITE]
 ** <li> [SQLITE_IOCAP_IMMUTABLE]
 ** <li> [SQLITE_IOCAP_BATCH_ATOMIC]
+** <li> [SQLITE_IOCAP_SUBPAGE_READ]
 ** </ul>
 **
 ** The SQLITE_IOCAP_ATOMIC property means that all writes of