diff --git a/db/mdb/public/mdb.h b/db/mdb/public/mdb.h
index ffd479c5711..d76729e43b6 100644
--- a/db/mdb/public/mdb.h
+++ b/db/mdb/public/mdb.h
@@ -1592,7 +1592,7 @@ NS_DEFINE_STATIC_IID_ACCESSOR(nsIMdbPortTableCursor,
 **|
 **|| dropping: when a caller expects a row or table will no longer be used, the
 **| caller can tell the collection to 'drop activity', which means the runtime
-**| object can have it's internal representation purged to save memory or any
+**| object can have its internal representation purged to save memory or any
 **| other resource that is being consumed by the collection's representation.
 **| This has no effect on the collection's persistent content or semantics,
 **| and is only considered a runtime effect.  After a collection drops
diff --git a/db/mork/src/morkPortTableCursor.cpp b/db/mork/src/morkPortTableCursor.cpp
index 3bd957c4dbb..f4d6581a568 100644
--- a/db/mork/src/morkPortTableCursor.cpp
+++ b/db/mork/src/morkPortTableCursor.cpp
@@ -104,7 +104,7 @@ morkPortTableCursor::morkPortTableCursor(morkEnv* ev,
     if ( ioStore && ioSlotHeap )
     {
       mCursor_Pos = -1;
-      mCursor_Seed = 0; // let the iterator do it's own seed handling
+      mCursor_Seed = 0; // let the iterator do its own seed handling
       morkStore::SlotWeakStore(ioStore, ev, &mPortTableCursor_Store);
 
       if ( this->SetRowScope(ev, inRowScope) )
diff --git a/db/mork/src/morkSink.h b/db/mork/src/morkSink.h
index c814db2c2c9..0efe4110596 100644
--- a/db/mork/src/morkSink.h
+++ b/db/mork/src/morkSink.h
@@ -83,7 +83,7 @@
 **| to efficiently accumulate many bytes between such function calls.
 **|
 **|| FlushSink: this flush method should move any buffered content to 
-**| it's final destination.  For example, for buffered writes to a
+**| its final destination.  For example, for buffered writes to a
 **| string medium, where string methods are function calls and not just
 **| inline macros, it is faster to accumulate many bytes in a small
 **| local buffer and then move these en masse later in a single call.
diff --git a/db/mork/src/morkStore.cpp b/db/mork/src/morkStore.cpp
index f66ddf9842e..7475e7c0e68 100644
--- a/db/mork/src/morkStore.cpp
+++ b/db/mork/src/morkStore.cpp
@@ -596,7 +596,7 @@ morkStore::LazyGetRowSpace(morkEnv* ev, mdb_scope inRowScope)
     {
       this->MaybeDirtyStore();
     
-      // note adding to node map creates it's own strong ref...
+      // note adding to node map creates its own strong ref...
       if ( mStore_RowSpaces.AddRowSpace(ev, outSpace) )
         outSpace->CutStrongRef(ev); // ...so we can drop our strong ref
     }
@@ -625,7 +625,7 @@ morkStore::LazyGetAtomSpace(morkEnv* ev, mdb_scope inAtomScope)
       {
         this->MaybeDirtyStore();
     
-        // note adding to node map creates it's own strong ref...
+        // note adding to node map creates its own strong ref...
         if ( mStore_AtomSpaces.AddAtomSpace(ev, outSpace) )
           outSpace->CutStrongRef(ev); // ...so we can drop our strong ref
       }