Careful with the terminology as by 'idiots guide' its reasonable to assume you meant the Equinox team at Avaya.
1. I don't know about IE but Avaya have dropped support for it from Avaya Communicator for Web from 30th Sept so wouldn't be shocked to find the same for Equinox if it had IE support.
2. Google in their security sweep of apps and extensions spotted that Avaya were being very naughty and forcing an extension on people's Chrome browsers. They ordered a stop to that. Rather than coding up a nice optional installation or putting their extension into the store of Google approved extension, they (the Avaya idiots) released a set of workaround instructions that require the user to hack the registry on their PC!!!!
From the Avaya manual:
Enabling the Avaya Equinox Client Google Chrome browser extension
Install Equinox Client.
Procedure
1. To clean up any existing Google Chrome extension registry values for Equinox Client, from C:\Program Files (x86)\Avaya\Avaya Equinox
\fTarget, run RemoveChromeExtension.reg.
2. To add the Google Chrome extension registry values for Equinox Client, from
C:\Program Files (x86)\Avaya\Avaya Equinox\fTarget, run
AddChromeExtension.reg.
3. Restart the Google Chrome browser.
The system displays the Equinox Client browser Chrome add-in, which works properly on Google Chrome.
Uninstalling the Avaya Equinox Client Google Chrome browser extension
1. From C:\Program Files (x86)\Avaya\Equinox\fTarget, run
RemoveChromeExtension.reg.
2. Restart the Google Chrome browser.
Stuck in a never ending cycle of file copying.