firefox start error - Couldn't load XPCOM

firefox start error - Couldn't load XPCOM

Check ubuntu is 32 bit or 64 bit and firefox is 32 bit or 64 bit.
Generally you get this when you install 32 bit firefox on 64 bit ubuntu.

Check your firefox is 32 bit or 64 bit, run in firefox
about:

If you get
Build identifier: Mozilla/5.0 (X11; Linux i686; rv:36.0) Gecko/20100101 Firefox/36.0
Note: i686, i386, i586 are 32-bit builds.

and if you get
Build identifier: Mozilla/5.0 (X11; Linux x86_64; rv:36.0) Gecko/20100101 Firefox/36.0
Note: x86_64 is 64-bit build.

Download 64 bit firefox from here.
Download 32 bit firefox from here.

DBD::Pg perl module hasn't been fully installed

install_driver(Pg) failed: Can't locate DBD/Pg.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at (eval 3) line 3.
Perhaps the DBD::Pg perl module hasn't been fully installed

sudo yum install perl-DBD-Pg

If you are using ubuntu, Run

sudo apt-get install libdbd-pg-perl

Install Zend Framework in XAMPP Ubuntu or any other Linux

Install Zend Framework 2 on XAMPP Linux

Ist method :
First change the directory.

cd /opt/lampp/htdocs

Now clone the framework using following git command :

git clone git://github.com/zendframework/ZendSkeletonApplication.git

Now change the directory again.

cd ZendSkeletonApplication

Run Command :

/opt/lampp/bin/php composer.phar self-update

Now

/opt/lampp/bin/php composer.phar install

and finally run command

curl -#L https://github.com/zendframework/ZendSkeletonApplication/tarball/master | tar xz --strip-components=1

Now you can open the zend frame work on your localhost using
http://localhost/ZendSkeletonApplication/public/

IInd method :
Run these commands :

cd /opt/lampp/htdocs
git clone git://github.com/zendframework/ZendSkeletonApplication.git --recursive

Now try to open framework using
http://localhost/ZendSkeletonApplication/public/