Install Client Integration plugin for vSphere Web client 5.*

Quick and dirty guide!
Tested on Ubuntu 12.04.5 LTS x64 Desktop in combination with Google Chrome Stable (Version 37.0.2062.120 (64-bit))

1. Navigate to your webclient
2. Download the client bundle
3. Perform following commands:

sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt-get update
sudo apt-get install freshplayerplugin

4. Create a diretory and run commands as root!

sudo mkdir /opt/google/chrome/plugins
chmod u+x ~/Downloads/VMware-ClientIntegrationPlugin-5.5.0.x86_64.bundle
sudo ./Downloads/VMware-ClientIntegrationPlugin-5.5.0.x86_64.bundle 

5. This will work for google chrome and mozilla firefox.

All credits go to: