When I auto update FirefoxPortable 4.0 Beta 3 te Beta 4, it is okay. But once I reboot the computer, when I try to open Firefox, it says, xul.dll not found. please help!
New: r3dfox (July 15, 2025), Platform 30.0.4 (July 15, 2025)
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If you're using Firefox's own built-in update feature then you will break the portable version. It is not recommended, nor supported for you to use this feature in the portable version.