I feel close to my answer - but missing just a bit. Anyway - here it is: I have Pop_OS 21.10 running on my laptop. I want to add a "desktop icon" to launch a second Firefox profile for my wife when she uses my laptop. I know "desktop icon" is sort of windows jargon - but I think you understand.
So far I have a text file named Firefox.wife on my desktop. In there is:
firefox -p Wife
"Wife" matches the second profile I made in Firefox. I made the file "executable" in Nautilus/properties. Double clicking it brings up a warning "Do you want to Run or display it's contents. I have to click execute.
Anyway - I just want to skip this step to make it simpler for her.
Bonus points for adding the icon to the bottom launcher bar I think called "Favorites". Currently I have an icon down there that opens my FF profile. When I do execute her script - it doesn't have a new special icon to click favorite on...
Thanks in advance, Frank