I am trying to run Firefox 8 and Firefox 5 versions at the same time on my Windows 7 machine.
Firefox 8 is my default browser and I installed Firefox 5 using custom options in a separate folder. I created a new profile for Firefox 5.
I am able to load both versions individually using
"C:\...\Mozilla Firefox 8\firefox.exe" -p default
"C:\...\Mozilla Firefox 5\firefox.exe" -p "Firefox 5"
However, I am not able to load them simultaneously. I even tried the -no-remote option. When I use the -no-remote option, it is trying to load the no-remote website.