I am a longtime user of Firefox. Firefox is my default browser...however all saved URL's are being opened by Safari. Safari also agrees that Firefox is my default browser. This started happening a few days ago. It does not seem to matter what browser I generate the URL address. All open in Safari. I have noticed that Safari is running very slowly, almost crawling along. Safari runs very, very slow even when Firefox is closed. Firefox is operating at all times as it did before this happening...fast. I know one is acting on the other somehow. All of this occured at the same time