hope your can help, this problem is really annoying and I can't find an answer.
I use Firefox with personal profile "FFbeta", which I start using command line parameters
C:\Program Files (x86)\Firefox5\firefox.exe -P "FFbeta" -no-remote. When I try to open links from thunderbird, instead of opening them in the running FFbeta instance, a new default profile Firefox starts.
The Win7 default programs settings allow only to set a program for handling a protocol but without command line parameter. I tried adopting the answer in Adding default command line options when opening a particular filetype and edited my registry as follows:
HKEY_CLASSES_ROOT/http/shell/open/command/(default)="C:\Program Files (x86)\Firefox5\firefox.exe" -P "FFbeta" -osint -url "%1"
Unfortunatly this didn't help. Is there another place in the registry I need to edit? Or is there another way to achieve the desired behavior?