Install Firefox 45 On Ubuntu 15.10 / 14.04 LTS / LinuxMint / CentOS / OpenSUSE

In this Tutorial I will show you how to install Firefox 45 on Ubuntu 14.04 LTS /12.04 LTS, LinuxMint 17 / 16 / 15 , Fedora ,  CentOS 6.X / 7.x , OpenMandriva & OpenSUSE

Firefox a most commonly used browsers by everyone and one of the standard browsers too.It is an opensource browser and it is developed by mozilla corporation and mozilla Foundation and  available for Multiple Operating systems (ie) Windows,Linux,Mac OSX. 
and it comes with its private mode and powerful plugins

Firefox Released its new stable Version 45.0 on March 8th 2016

Changelog in Firefox 45.0

• Instant browser tab sharing through Hello
• Tabs synced via Firefox Accounts from other devices are now shown in dropdown area of Awesome Bar when searching
• GTK3 integration (GNU/Linux only). Disabled after beta 4
• Synced Tabs button in button bar
• Introduce a new preference (network.dns.blockDotOnion) to allow blocking .onion at the DNS level
• Guarani [gn] locale added

Fixes and changes:

• URLs containing a Unicode-format Internationalized Domain Name (IDN) are now properly redirected
• Tab Groups (Panorama) feature removed

HTML5:

• Push API support, part of Progressive Web Applications
• Support delivery of a Content Security Policy (CSP) via a meta tag
• Web Speech synthesis API
• ES6 Classes

Installation Steps:

Method 1 (For Debian based systems) Via PPA 

Best and easy way is to upgrade firefox by updating the Repository, it will automatically upgraded to new version

sudo apt-get update

sudo apt-get upgrade

Method  2 : Via tar file

Step 1:Download The Latest Version of Firefox 45 from their FTP using wget

For 32 bit systems

wget https://ftp.mozilla.org/pub/firefox/releases/45.0/linux-i686/en-US/firefox-45.0.tar.bz2

For 64 bit systems

wget https://ftp.mozilla.org/pub/firefox/releases/45.0/linux-x86_64/en-US/firefox-45.0.tar.bz2

Step 2: Extract the tar package

tar -xjf firefox-45.0.tar.bz2

Step 3: Move the Firefox 45 folder to opt
Remove the Older version of firefox if it's there

sudo rm -rf  /opt/firefox

sudo mv firefox /opt/firefox45

Step 4: Create Symbolic link for New Firefox as default

sudo mv /usr/bin/firefox /usr/bin/firefoxold

sudo ln -s /opt/firefox45/firefox /usr/bin/firefox

Step5:Check the installed version by using the below command

# firefox --version
Mozilla Firefox 45.0