Firefox 18.0 Beta 7 Multilingual

Web browser without installation.
Download Portable Nightly 32-64 MultiVersion en-US Online (0.4 MB)
In first screen enter Version Number: 20.0a1
Download Portable Aurora MultiVersion Multilingual Online (0.4 MB)
Select language and enter Version Number:19.0a2
Download Portable Firefox MultiVersion Multilingual Online (0.4 MB)
Select language and enter Version Number:18.0b7 or 17.0.1 or 10.0.11esr or 3.6.28

Final and Beta use same launcher and profile but Aurora and Nightly have their own.
Results in Acid3 Test : 100 %

Optimized Firefox Browser without installation.
Download Portable Pale Moon 15.x 32-64 bit Multilingual Online (0.4 MB)
Select language and enter Version Number : 15.3.2
On first run, check allow Language Pack installation, click on Continue but close and restart by launcher.
Download Portable Pale Moon 3.6.x Multilingual Online (0.4 MB)
Select language and enter Version Number : 3.6.32

64-bit variant of Firefox without installation.
Download Portable Waterfox 16.0.1 en-US (23.0 MB)