My USB stick with Firefox portable works fine on my laptop, but if I use it in any desktop PC, Firefox addons manager deactivates several (not all, but always the same) addons, so I have to update all and activate.
Do some addons save necessary temporary files to the PC even though this is a portable version of Firefox, and is not installed on the local machine?
Are there any other download sources for Firefox portable builds i can test than on portableapps.com?