[orca] Fix silly mistake in dumpCache and disable preservation by default

[Joanmarie Diggs <joanied src gnome org>]

commit ccc142a6023ac9b4698dc019e7f956ad5a472bea
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Dec 15 15:04:43 2020 +0100

    Fix silly mistake in dumpCache and disable preservation by default

 src/orca/scripts/web/script_utilities.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/orca/scripts/web/script_utilities.py b/src/orca/scripts/web/script_utilities.py
index d21d318d8..6061c6dc0 100644
--- a/src/orca/scripts/web/script_utilities.py
+++ b/src/orca/scripts/web/script_utilities.py
@@ -127,7 +127,7 @@ class Utilities(script_utilities.Utilities):
         for key in toRemove:
             self._caretContexts.pop(key, None)
 
-    def dumpCache(self, documentFrame=None, preserveContext=True):
+    def dumpCache(self, documentFrame=None, preserveContext=False):
         if not documentFrame or self.isZombie(documentFrame):
             documentFrame = self.documentFrame()
 
@@ -143,7 +143,7 @@ class Utilities(script_utilities.Utilities):
         if preserveContext and context:
             msg = "WEB: Preserving context of %s, %i" % (context[0], context[1])
             debug.println(debug.LEVEL_INFO, msg, True)
-            self._caretContexts[documentFrame.parent] = context
+            self._caretContexts[hash(documentFrame.parent)] = context
 
     def clearCachedObjects(self):
         debug.println(debug.LEVEL_INFO, "WEB: cleaning up cached objects", True)