Tested in Safari 9 for 16.04 and 15.10 release. Block can not be deleted (but can be updated).
Block can be updated and deleted for other browser with same release as above (16.04 and 15.10).
Tested in Safari 9 for 16.04 and 15.10 release.
Block can not be deleted (but can be updated).
Block can be updated and deleted for other browser with same release as above (16.04 and 15.10).