hi
have CIS last version my system w7 x64
problem with feature Sandbox is slow or unstable my connection When هis activated 
Do you run your browser in manual sandbox?
yes ,
I’m not mean Browser in general every thing is slow …downloads by idm …etc
Have you tried a speed test with a sandboxed and unsandboxed browser?
The sandbox is only virtualizing your file system. It doesn’t have anything to do with your internet connection.
Edit: Moving this thread to a Help forum, because this isn’t a bug report, and the bug reporting section isn’t an appropriate place for discussion.