A Firefox extension to store your firefox configurations online, so you have the same Firefox all oer 
.
I guess what you do need to carry is the .xpi so you can install it on a new firefox, now I wonder if after I leave my data is errasedor not from there.
I’ll give it a shot later on when I’m at home 
I’ve seen this before, but I can’t remember… I think it was Firefox movile profiles?
Since now its Google doing it, I will remmeber