Due to recent problems with downloading attached files here from 2 posts with classilla i had to get another copy of the ak.sys program again.
I´ll reattach it just in case anyone is having the same problem.
I take note that IE opens .sit and .hqx (maybe more) compressed files and expand them, while Classilla cant tell what kind of file has downloaded, and also never take you to stuffit to expand them. But Classilla downloads faster than IE.
If you tell classilla to open the file after downloading, it sends it to finder to "open" and finder "can't get an app to open it" and you can go to take a coffee, because the machine will be halted until you change to finder app and close that error message (that still say that doesn't know how to open it) for an unknow/barely regular amount of time.
If the file to download is small, I use classilla, but I never tell classilla to open it after download.
You just need to drop the downloaded file over stuffit app and it will open (expand it) flawless.
I think we need to rebuild desktop to make classilla aware of the stuffit files. (?)