I had the same problem - CUPS admin interface hangs in Modify Printer - and after debugging and stracing I came across this bug report. The fix seems to be to use a different browser, ie Chrome / Opera
-- cups remote https administration hangs https://bugs.launchpad.net/bugs/218663 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
