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# [Closed by Request]New Opera developer 29

• Question: Is there a way to start opera with all extensions disabled? Would be useful for problem determination.

• Hi @hasi68: yes, you can, you need to add the "--disable-extensions" command line switch at the end of the shortcut, which you use to launch the Opera, as follows:

On Windows: "\path\to\launcher.exe" --disable-extensions

On Linux: /path/to/opera-develper --disable-extensions

In case, that you want to check also, whether one of the flags is the culprit or not, you can add the "--no-experiments" switch, as shown below:

On Windows: "\path\to\launcher.exe" --no-experiments

On Linux: /path/to/opera-develper --no-experiments

Small note: you can use both of the above switches at once, just make sure to add a space between them.

• Hi @l33t4opera: Thanks a lot for your useful tips. I solved the problem with the print preview already. It was my fault, i disabled the internal chrome pdf viewer plugin because I'm using the pdf extension, but the print preview needs the internal pdf viewer.

• With the latest developer version, I am seeing some (but not all) HTML selects not rendering correctly or rendering as empty.

Linux/Arch/HiDPI.

• +1, discretely hinting to this topic

• New Opera developer 29.0.1794.0, the change log, and the announcement

\m/ :cheers:

• 29.0.1794.0 doesn’t work at all for me. I can open Opera, but no pages, not even speed dial, settings, about, etc. All I get is ”Slut på minne” (Out of memory). Reinstalled with Synaptic, restarted the system. No difference. Two Opera-processes are active: opera-developer and its gpu-process. Ubuntu 14.10 64-bit, 7,5 GiB RAM.

• Completely uninstalled and installed again, no difference.

joakim@JoWa:~\$ opera-developer
[0306/200914:ERROR:zygote_host_impl_linux.cc(85)] Trying to restart the zygote/sandbox multiple times in quick succession. Something is probably very wrong, we will will give up.
[0306/200914:ERROR:url_pattern_set.cc(240)] Invalid url pattern: opera://print/*
[0306/200914:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0306/200914:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0306/200914:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0306/200914:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0306/200914:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0306/200914:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0306/200914:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0306/200914:ERROR:child_process_launcher.cc(529)] Failed to launch child process

• After installing Opera developer 29.0.1794.0 (windows 8.1 32bit) i installed java 8.40 and now java doesn't work at all in the browser. When using the java test page https://www.java.com/en/download/installed.jsp I only get the error message that the page abended (i don't know the exact english text because the message is in german). Same when I try to test java applets. The java installation went well and i can test java successfully in other browsers like firefox.

• Hi, I solved my java problem: it was caused by the plugin settings: I had not checked " execute all plugins" but "execute important plugins"

• joakimwallden: When i started opera developer in the terminal just with opera-developer, it works. But when I start with sudo opera-developer, I get exactly the same error that you get; "out of memory"/"slut på minne" (I am from Sweden too). It seems like there is some sort of bug, perhaps we should move this discussion to a thread in the opera for linux category.

• It’s the other way around for me. Opera works when started with sudo. O.O

• joakimwallden: Try to change the owner of the files in ~/.config/opera-developer and ~/.cache/opera-developer to you. They could have been set to root.

• Thanks gustavwiz. Those folders are mine. I uninstalled 29.0.1794.0 and installed 29.0.1788.0. Runs with no problems.

• Why not just move the tab site on the sidebar (Ctrl Shift C)? In addition Extensions Sidebar add move option.

• Opera 29.0.1795.0:

[0311/163836:ERROR:zygote_host_impl_linux.cc(85)] Trying to restart the zygote/sandbox multiple times in quick succession. Something is probably very wrong, we will will give up.
[0311/163836:ERROR:url_pattern_set.cc(240)] Invalid url pattern: opera://print/*
[0311/163836:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0311/163836:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0311/163836:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0311/163836:ERROR:channel.cc(299)] RawChannel read error (connection broken)
[0311/163836:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0311/163836:ERROR:channel.cc(299)] RawChannel read error (connection broken)
[0311/163836:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0311/163836:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0311/163836:ERROR:child_process_launcher.cc(529)] Failed to launch child process
[0311/163836:ERROR:child_process_launcher.cc(529)] Failed to launch child process

• New update - Opera developer 29.0.1795.0, the change log, and the announcement.

\m/ :cheers:

• Hi @joakimwallden, and what if you run the opera-developer with the switch as follows: opera-developer --no-sandbox ?

• Hi l33t4opera. Opera 29.0.1795.0 works with --no-sandbox. (I will not use it without sandbox, though.)

• @joakimwallden, I'm aware of that, this was just to test, if the problem can be related to the sandbox feature, now please run this command: ls -l /usr/lib/x86_64-linux-gnu/opera-developer/opera_sandbox, and paste here, what it displays.