Bug 26353: Prevent speculative connect that violated FPI.

Connections were observed in the catch-all circuit when
the user entered an https or http URL in the URL bar, or
typed a search term.

toolkit/components/remotebrowserutils/RemoteWebNavigation.jsm

@@ -95,6 +95,9 @@ class RemoteWebNavigation {
       }
 
       uri = Services.uriFixup.getFixupURIInfo(aURI, fixupFlags).preferredURI;
+/*******************************************************************************
+   Disable the following speculative connect until
+   we can make it properly obey first-party isolation.
 
       // We know the url is going to be loaded, let's start requesting network
       // connection before the content process asks.
@@ -118,6 +121,7 @@ class RemoteWebNavigation {
         }
         Services.io.speculativeConnect(uri, principal, null);
       }
+*******************************************************************************/
     } catch (ex) {
       // Can't setup speculative connection for this uri string for some
       // reason (such as failing to parse the URI), just ignore it.