Download Latest Version Iceweasel-v160.0.l10n_win64_pgo.7z (92.8 MB)
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Portable Runtime For Firefox. Feature (32bit and 64bit)

Getting the source of libportable:

git clone https://github.com/adonais/libportable.git


releases builds of the Iceweasel(Firefox) Web Browser that use sse2 & pgo form the Mozilla Firefox project

some patches from Debian GNU project.

System requirements:

OS 	        Win xp sp3, Win Vista, Win 7, Win 8/8.1, Win 10
CPU 	        Pentium 4 or newer processor that supports SSE2
Memory 		512MB of RAM
HDD 		200MB of hard drive space 
Source: README, updated 2015-08-01