Firefox is an open source browser developed by the Mozilla foundation. Firefox is by all means a full feature browser and one of the few browsers with its own rendering engine as more and more producers switch to the WebKit engine.

The Desktop Browser

Versions 1 to 5

Very decent browser built on the scraps of Netscape. These versions lack proper CSS3 support, CSS transitions, CSS animations, FormData, PushState.

These versions were released from 2002 to 2011.

Categorized as: desktop_light

Versions 6 to 48

From version 5 and onwards Mozilla has released a new version every 1-2 months.

Added support for CSS transitions and good allround support for most W3C features, though a lot of them still require the -moz prefix.

These versions were released from 2011 to 2016.

Categorized as: desktop_light

Versions 49+

With version 49 Firefox supports for webGL, Web Cryptography and Promises among other things.

These versions were released from 2016.

Categorized as: desktop

The Mobile Browser

The mobile version is also known as Fennec and uses the same rendering engine and versioning as the Desktop browser. Apple does not allow for other rendering engines then WebKit on iOS, so no Gecko on iOS.

Versions 1-48

Even the earliest version of Firefox are strong enough to qualify for the mobile segment.

These versions were released from 2010 to 2016.

Categorized as: mobile

Versions 49+, iOS

Using the WebKit of iOS rather than the Gecko engine, this one is essentially just a Safari with a different look.

All iOS versions are indexed along with the Apple Safari versions.

Versions 49+, Android

Fully compatible with the smartphone segment requirements.

These versions were released from 2016.

Categorized as: smartphone

Versions 49+, Others

The Firefox mobile browser is also available for other platforms, which either doesn't have a touchscreen or otherwise fails to meet the smartphone requirements.

Categorized as: mobile

The Tablet Browser

The mobile version is also known as Fennec and uses the same rendering engine and versioning as the Desktop browser. Apple does not allow for other rendering engines then WebKit on iOS, so no Gecko on iOS.

Versions 1-49

Still not sporting the extended requirements of the tablet segment. It uses the tablet marker in useragent to separate itself from Firefox mobile.

These versions were released from 2010 to 2016.

Categorized as: tablet_light

Versions 49+, iOS

Using the WebKit of iOS rather than the Gecko engine, this one is essentially just a Safari with a different look.

All iOS versions are indexed along with the Apple Safari versions.

Versions 49+, Android

It uses the tablet marker in useragent to separate itself from Firefox mobile.

These versions were released from 2016.

Categorized as: tablet