Problem with browser Firefox

[Valtam]

Hello Boschini.
If there is a firefox topic I will post here,if you don't mind,because I also have problems with FF.
First thing is that browser starts opens itself when system starts and it's not set up by me to do so.
Second thing is that somehow Gimp,intead of Transmission,has become default program to open torrent files,but only when I want to open them directly after downloading.If I open torrent files in thunar everything is ok and Transmission opens it.Any help,please?

Please start your own thread. Thank you.