Just gave Cyberfox a spin - at first it looked spiffy but after syncing with Mozilla, everything just went quirky and toolbars were out of order. I have about 20 addons with Firefox that work just fine there. Don't feel like going through a tedious process of elimination with Cyberfox.
Palemoon is nice. It does have its hicks though.
Haven't tried it on Linux but it is really good (fast) on Nexus 7!
Can't say the same for Windows 7 64bit.
@40hz, are you still with LM (Ubuntu based distro)?