[orca] Re-enable announcement of page tab switches in Firefox

[Joanmarie Diggs <joanied src gnome org>]

commit d42d540b245702a1f210ba965d3f145a0822872c
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Thu Jan 11 10:11:01 2018 -0500

    Re-enable announcement of page tab switches in Firefox
    
    Note that if you do not have Firefox nightly, the presentation may occur
    after the location in the page is presented.

 src/orca/scripts/web/script.py |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/scripts/web/script.py b/src/orca/scripts/web/script.py
index 4ed00a7..f4ac5b9 100644
--- a/src/orca/scripts/web/script.py
+++ b/src/orca/scripts/web/script.py
@@ -1774,8 +1774,10 @@ class Script(default.Script):
             return True
 
         if self.utilities.eventIsChromePageSwitchNoise(event):
-            msg = "WEB: Ignoring event believed to be chrome page switch noise"
+            msg = "WEB: Event believed to be chrome page switch"
             debug.println(debug.LEVEL_INFO, msg, True)
+            if event.detail1:
+                self.presentObject(event.source)
             return True
 
         if not self.utilities.inDocumentContent(event.source):