Hello
In versions 6.5 and 6.7 we have 2 clients to connect to the vcenter server or ESXi Host :
vSphere web client (Adobe Flash)
vSphere client (HTML5)
In version 7 only vSphere client (HTML5) is available.
vSphere web client (Adobe Flash)
A browser with the Adobe Flash player plugin is required.
Personally I use the following combination, but only to manage VMware, to surf the internet I use a more current browser.
Firefox ESR 38.8 (32bits)
Adobe Flash 29.0.0.113
To login using the vSphere Web Client (Flash). You can instead open a Web browser and enter the URL
https:// ip_address/ui
vSphere client (HTML5)
A browser that supports HTML5 is required
To use the vSphere Client (HTML5) , enter the URL:
https://ip_address/vsphere-client