Can I install all softwares to debian which I was having in ubuntu?
Like firefox,chrome,vlc,and other free softwares

yes, especially seeing as those are just about THE most common packages imaginable...

Iceweasel=Firefox , that said if you want the actually Firefox you will need to download it from Mozilla. Same goes for Icedove=Thunderbird.

$ apt-cache policy iceweasel
iceweasel:
Installed: 10.0.2-1
Candidate: 10.0.2-1
Version table:
11.0~b5-1 0
1 http://ftp.us.debian.org/debian/ experimental/main i386 Packages
*** 10.0.2-1 0
500 http://ftp.us.debian.org/debian/ unstable/main i386 Packages
100 /var/lib/dpkg/status


Debian repos have Chromium, for Chrome you will need to download it from Google.

Other than that yes most packages in *buntu are also in the Debian repos.

Mozilla/5.0 (X11; Linux i686; rv:10.0.2) Gecko/20100101 Firefox/10.0.2

$ apt-cache policy vlc
vlc:
Installed: 1:2.0.0-0.1
Candidate: 1:2.0.0-0.1
Version table:
*** 1:2.0.0-0.1 0
500 http://www.debian-multimedia.org/ unstable/main i386 Packages
500 http://debian.dc-uoit.net/debian-multimedia/ unstable/main i386 Packages
100 /var/lib/dpkg/status
2.0.0-6 0
500 http://ftp.us.debian.org/debian/ unstable/main i386 Packages

$ apt-cache policy google-chrome-stable
google-chrome-stable:
Installed: 17.0.963.65-r124586
Candidate: 17.0.963.65-r124586
Version table:
*** 17.0.963.65-r124586 0
500 http://dl.google.com/linux/chrome/deb/ stable/main i386 Packages
100 /var/lib/dpkg/status

$ apt-cache policy chromium
chromium:
Installed: (none)
Candidate: 17.0.963.56~r121963-1
Version table:
17.0.963.56~r121963-1 0
500 http://ftp.us.debian.org/debian/ unstable/main i386 Packages


$ apt-cache policy google-chrome-beta
google-chrome-beta:
Installed: (none)
Candidate: 18.0.1025.45-r124098
Version table:
18.0.1025.45-r124098 0
500 http://dl.google.com/linux/chrome/deb/ stable/main i386 Packages

$ apt-cache policy google-chrome-unstable
google-chrome-unstable:
Installed: (none)
Candidate: 19.0.1055.1-r123982
Version table:
19.0.1055.1-r123982 0
500 http://dl.google.com/linux/chrome/deb/ stable/main i386 Packages

2 members found this post helpful.

Most of the packages available in the Ubuntu repos originate in the Debian repos and are modified and put in the Ubuntu repos by the Ubuntu devs.

A very few come from the upstream source like Firefox and Thundbird.

Why bother having to create a .deb from scratch when you can get one direct from Debian and just modify the install script?

You will find anything you need in the Debian repos.

As some smart a$$ has in his sig;
Debian - "If you can't apt-get something, it isn't useful or doesn't exist"

This is true.

1 members found this post helpful.