In Firefox for Mac 32.0.3, in Preferences, in Security, the "Block reported attack sites" is unchecking itself. I keep manually turning on this setting because I want Firefox to block reported attack sites, but every morning when I wake the computer from sleep and sign in, I notice that this setting has been turned off again. This morning, I noticed something odd too. When I tried to access the Security tab in Preferences, it took a long time for it to load. When it finally did, the "Block reported attack sites" was unchecked again. No one has physical access to this computer and browser but me. Have I been hacked?