Thanks for that you thank me for the work I do, for all of you which are ungrateful and calling yourself hackers or IT specialists. You should be glad that someone shares their work. And his researchings just like that for free, just say thanks, this is not so hard, that's all.
Installation 1. cd Desktop/
2. wget https://ftp.mozilla.org/pub/firefox/releases/58.0b4/linux-x86_64/en-US/firefox-58.0b4.tar.bz2
3. tar -xvf firefox-58.0b4.tar.bz2
4. mv firefox /opt/
5. apt install alacarte
Use "main menu" to setup firefox location for start
NOTE: Warning, save your all sessions and bookmarks before installation!
Have fun =)