With the introduction of version 11.1.2.4, it’s more and more relevant to use Firefox instead of IE with the EPM System. Now while testing the new version, the only problem I have run into is, that it might be that while trying to use the functionality “Open in SmartView”:
OpenInSmartView
You encounter this:
Error

For that one user you will need to add a registry key, to fix it, something like this pointing to the installation location of SV:

For this to take effect, restart Firefox. After restart it will ask you if it may install the extension, that should be now visible in the add-on tab:
SVExtension

Hope this helps 🙂