I had this problem in waterfox as well.
It is a new installation, so no addons. I killed all my AV/firewall/security before installing to eliminate the possibility of some UPX issue.
I am actually wondering if, like the fresh install I did from a zip of the non portable version, it might be loading addons from another profile. Is there a way to start it in 'safe mode' with a clean profile?
Operating system: Windows 8.1
Browser version: Palemoon-Portable-27.5.1.win64
32-bit or 64-bit?: 64
app is in task manager, but never opens.
Also, can the mods please wait to close this until there is actually a fix/resolution, please?
Also wondering if the portable can be released as a zip in case somehow it is some weird upx thing. I doubt it, because I even closed all my security in task manager, but I would still like to try it.