Ionic serve is extremely slow


Please some help, I’m new to ionic and I just create Login and Register and also I have tabs in the apps , the thing is when I do " ionic serve " and my browser "Mozilla Firefox " show me the “Login Page” but when I click to "Inscription " (register) it just still showing the Alert , but the registration is done (like (Firebase)) and my browser stop working untill I ended the process Firefox in Windows Task Manager
(PS: I’m sorry for my English but I hope you get the idea )

ll ok%3Blok