Palemoon not starting - Pale Moon forum (2024)

W10 22H2:
Palemoon, last version OR Firefox 129.02:
64-bit browser?:

Since about 5 days, Palemoon just doesn't start : I have message about not succeeding to start (0xc0000142) and I can't not get rid of it, even when clicking OK !
I tried to load the last version and to reinstall it, but to no avail.
I have no virus and I don't know what to do.
Thank you for your help.

If it did work and the current version doesn't, it is an indicator that your machine doesn't support AVX.
Please post your processor model.

Why can't you use the ftp link?

If you are in Windows, you can mount ftp sources in the windows explorer by typing the ftp URL in the path field (normally there is something like C:\users\ etc.)

First step: go to Help/Troubleshooting Information/CPU Capabilities and report back.

Second step, depending on previous one: use that FTP link. If for whatever reason you can't (Pale Moon shouldn't have problems with it - perhaps you are using some other version?), this link should work: https://ftp2.palemoon.org/avx/

Malbec wrote: ↑

2024-08-31, 10:40

Thank you for your quick answer, but I'm afraid it not the good explanation : Palemoon DID worked on this machine, but suddenly stopped!

I'm afraid that doesn't prove anything, until you provide more information. That explanation was perfectly logical. Also, what Firefox 129.02 has to do with this?

Safe Mode / clean profile info: Help/Restart in Safe Mode
Information to include when asking for support - How to apply user agent overrides
How to auto-fill passwords

Windows 10 Pro x64

Malbec wrote: ↑

2024-08-31, 18:00

Isn't this version likely to be overwritten in a future update?

No, because SSE2 (and AVX2) community builds use their own update channel.
As a matter of fact, you should not have been served an update from 33.2.1 to 33.3.0 if your processor didn't support AVX, so it's a bit of a mystery how you ended up in this situation to begin with, unless you manually installed or maybe used an external updater?

And what does SSE means ?

https://en.wikipedia.org/wiki/Streaming_SIMD_Extensions

This is also impacting Windows winget installs & updates. Windows 11 23H2 on ancient hardware:

PS C:\Users\simon> winget search palemoon
Name Id Version Match Source
------------------------------------------------------------------------
Pale Moon MoonchildProductions.PaleMoon 33.3.1 Moniker: palemoon winget
PS C:\Users\simon> winget search palemoon --versions
Found Pale Moon [MoonchildProductions.PaleMoon]
Version
-------
33.3.1
33.2.1
PS C:\Users\simon> winget uninstall --id MoonchildProductions.PaleMoon --exact
Found Pale Moon 33.3.1 (x64 en-US) [MoonchildProductions.PaleMoon]
Starting package uninstall...
Successfully uninstalled
PS C:\Users\simon> winget install --accept-package-agreements --accept-source-agreements --id MoonchildProductions.PaleMoon --exact --source winget --scope machine
Found Pale Moon [MoonchildProductions.PaleMoon] Version 33.3.1
This application is licensed to you by its owner.
Microsoft is not responsible for, nor does it grant any licenses to, third-party packages.
Downloading https://rm-eu.palemoon.org/release/pale ... taller.exe
██████████████████████████████ 34.3 MB / 34.3 MB
Successfully verified installer hash
Starting package install...
Successfully installed
PS C:\Users\simon>

The installer doesn't winge. Reinstalled it generates a 142 error when I attempt to run it.

From a CPU-Z report: Instructions setsMMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, EM64T, VT-x

SSE4.1 is sufficient to get Windows 11 23H2 up, but Windows 11 24H2 would require SSE4.2

For convenience:https://github.com/microsoft/winget-pkgs/tree/master/manifests/m/MoonchildProductions/PaleMoon

That's on an old quintuple-boot machine. I suspect it may be a similar story on its OS X El Capitan Palemoon upgraded via Homebrew casks. I'll come back on that ...

Moonchild wrote: ↑

2024-08-31, 18:17

Malbec wrote: ↑

2024-08-31, 18:00

Isn't this version likely to be overwritten in a future update?

No, because SSE2 (and AVX2) community builds use their own update channel.
As a matter of fact, you should not have been served an update from 33.2.1 to 33.3.0 if your processor didn't support AVX, so it's a bit of a mystery how you ended up in this situation to begin with, unless you manually installed or maybe used an external updater?

And what does SSE means ?

https://en.wikipedia.org/wiki/Streaming_SIMD_Extensions

Hello everyone,

I have similar error code 0xc0000142 on each of three Dell desktops running Windows 10. I found Pale Moon runs in version 33.2.1 but updates 33.3 and 33.4 generates the error code.
I tried re-installation of Pale Moon and some common fixes but the best fix is to run only on version 33.2.1

No bother really!

SimonFastEddy

Which processor do you have?
Did you try the SSE2 builds?
ftp://ftp.palemoon.org/avx/

Pentium4User wrote: ↑

2024-10-31, 11:59

Which processor do you have?
Did you try the SSE2 builds?

It seems like they piggy-backed on this thread without even reading it.