I believe it’s you thats misunderstanding something here.
i know firefox gives you the option to open the file without having to save it.
Internet Explorer began giving the user the option of “run” as well as “save” when downloading a file, and firefox also gives you similar option, but the part that you (and many other users) don’t understand is BOTH of these options saves the torrent file on your computer.
If you select “save”, then you decide where it’s going to be saved, and therefore can remove it very easily.
If you select “run”, it will be saved to a hidden system folder, and with default windows settings, you won’t be able to find it if you need it, nor to delete it.
I’ll also point out that most computer program developers recommend closing all applications when you install, which is a good idea, but completely impossible if your launching the program from within a web browser. Personally I think it’s really stupid for a web browser to prompt you to run an exe file. I recommend you let your web browser do what it was made for, which is browsing the web, and if you want to launch program, that you do it from windows.
Something as simple as opening a .torrent shouldn’t be a problem from within a web browser, but if you do, your still saving the torrent. In fact, it’s highly likely that you have at least one hidden system folder thats full of all kinds of stuff that you assumed wasn’t being downloaded, but its completely impossible to run a program without downloading it first.
Regarding uTorrent, it cannot delete the torrent before the task is downloaded, and even after download is complete, you cannot continue to seed if you have deleted it. If I download a torrent to my desktop then open it in uTorrent, it will then copy that torrent to another location. With uTorrent you can select the location where you want it to save it (if you want to make it easy to delete later), or you can let utorrent save it where ever the default setting wants it to go.
In uTorrent go to…
Preferences>directories>location of torrents>store torrents in
There you can select where the torrent gets saved. Just remember, if you delete the torrent, then you cannot continue to seed it, so make sure you have uploaded your fair share before doing so.