System freeze-up

[Moltke]

RESULTS

Code:

IPDL protocol error: Handler returned error code!

###!!! [Parent][DispatchAsyncMessage] Error: PLayerTransaction::Msg_ReleaseLayer Processing error: message was deserialized, but the handler returned false (indicating failure)

Well, one thing I can tell you is that you're not alone with this issue, a web search on IPDL protocol error: Handler returned error code! returns result on FF, most of them https://www.google.com/search?client=fir...or+code%21
One thing you can try to troubleshoot and narrow down the issue, is download Firefox https://www.mozilla.org/en-US/firefox/al...op-release
Once you do:
1. Extract the contents of the .tar.gz file, this will result in a folder named firefox
2. Open the firefox folder and locate firefox and firefox-bin files, select each at a time, hit left Alt + Enter, this will open the properties' dialog, check the box that reads make this file executable or some similar wording.
3. Right-click in a blank space within the firefox folder and from the context menu select open terminal here
4. In the terminal type

Code:

./firefox

and hit Enter to launch the browser, check if you get any errors this time, if you do, then there might be something wrong with your xfce4-session. If you don't, that is, no freezes and FF behaves as expected, then the FF's version installed might be corrupted or something.

EDIT: I just thought of another way:
1. Before downloading FF, open thunar, the file manager.
2. Hit Ctrl + h to show the hidden files.
3. Locate the .mozilla folder.
4. Select it and rename it to something like .mozilla.old
5. Launch Firefox from terminal.
What this will do is launch FF anew; no profile, and will create a new .mozilla folder. So, in theory, if something's wrong with your FF's profile, you shouldn't get any errors. In short, this procedure is to check that your FF's profile isn't corrupted or something, and if you don't get any errors, you could delete .mozilla.old. If you do get the same behavior, the download FF and proceed as explained above.