Installing a particular version of FireFox on Linux

Does an existing version of firefox exist?
```
firefox --version
```
If not, skip to (3).
Install dependency
```
sudo apt-get install libgtk2.0-0
```
Download firefox version: FireFox's release archive can be found at https://ftp.mozilla.org/pub/firefox/releases/. You will need to use the appropriate version (typically linux-x86_64, but you can run arch or uname -m to check if your machine is 64 or 32 bit).
```
wget https://ftp.mozilla.org/pub/firefox/releases/45.0.2/linux-x86_64/en-GB/firefox-45.0.2.tar.bz2
# Saving to: ‘firefox-45.0.2.tar.bz2’
```
Extract the binary
```
tar xvf firefox-45.0.2.tar.bz2
```
Backup existing firefox directory

If you have a firefox already installed, back-up the existing version:
```
sudo mv /usr/bin/firefox /usr/bin/firefox-backup
```
and remove the symbolic link
```
rm /usr/bin/firefox
```
Move the extracted firefox directory
```
sudo mv firefox/ /usr/lib/firefox
```

Create a symbolic link to the firefox binary

sudo ln -s /usr/lib/firefox /usr/bin/firefox

mirsahib/install-firefox-linux.md