Google Chrome is a free web browser but it is not open source, it is the most used web browser for desktop.

Firefox is a free and open-source web browser that provides a number of features for easy web browsing.

Development credit of Google Chrome goes to Google Inc.

Firefox development was done by Mozilla Foundation.

Google Chrome have a support feature for Adobe Flash Player.

Firefox does not have a support feature for Adobe flash player.

Google Chrome is only a decade old as it was released in 2008.

Firefox is much older than it was released in 2002.

The webkit engine layout is been used by Google Chrome.

For engine layout, the code library used by Firefox is Gecko.

The programming languages used for chrome development is C++ and Python.

It was developed using many languages like JavaScript, C, C++, XBL, CSS etc. 

Google Chrome gives the best performance on desktop but on mobile screens, it lacks in performance. 

Firefox uses RAM efficiently so it gives the best performance on desktops as well as on mobiles.

Customization option is not available in the case of Google Chrome.

Customization according to the user need is possible in Firefox.