When logging in to vCenter 6.0 using Firefox, you will find that there are flash errors when logging in, such as: To view this page ensure that Adobe Flash Player version 11.5.0 or greater is installed. The error is as follows:
First enter about:config in the Firefox browser and
check to warn me when I try to modify the underlying preferences
Then enter extensions.blocklist.enabled and
click to disable flash.
Finally, download an installation of Adobe flush 11.7 or so. If you still have problems logging in, please choose another browser, such as 2345 browser, or IE11 kernel.