Firefox cursor freeze and more

Has anyone else noticed these problems in firefox 24? 

When the vault is open and you click on the toolbar icon to display your logins, the cursor freezes for about a second before you can move it to select the desired log on.  This lag/freeze does not occur in Internet explorer 10.

Also, when you log into the vault and check the settings it always states that  the firefox extension is deleted or unavailable.  Restarting firefox twice seems to cure this.  Once again this problem does not occur in internet explorer 10.

Does anyone know if Symantec has ever given us, the users, a detailed explanation as to why they want us to store our logins in the cloud, as opposed to local storage?