Hi

The latest release version of Firefox for Android is 57. So that we can best help you, please can you provide further information around the plugins or other features you need version 4.9 for?

MAJOR1 said

how to get version 4.9 Need this older version to install Plugins'

4.9 as in four.nine or forty-nine.zero ?

There is no such 4.9 version as Android Firefox started mainly at version 4.0 (four.zero) and like desktop Firefox the next major version was 5.0 (five.zero)

Plugins as in the old EOL Flash Player Plugin from Adobe or do you mean Extensions? https://addons.mozilla.org/android/

If you mean Flash Player Plugin, the Firefox 56.0 and later Releases for Android dropped support of this old vulnerable Plugin.

Sorry, should have been 49.2.0 thanks

Ok so why do you think you need the old Firefox 49.0.2 ?

There really was only one Plugin that Firefox users used to use with Firefox for Android and that was Flash.

Unless you meant a Extension https://addons.mozilla.org/android/

http://archive.mozilla.org/pub/mobile/releases/

Ok, all set now, thanks for your assistance.

Show how install version 4.9

Solution