One thing that’s been bugging me a lot with Opera is the fact that the error console pops up when errors occur on a web page. This is great and all if you’re trying to debug your own website, however not so much when I’m trying to find a solution to a compile error at 3 in the morning.
As of this writing, Opera 11.51 is the latest version. I can’t guarantee this will work for later versions.
In order to disable this window from popping up, go to opera:config and search for “Error Console Filter”. You should see something similar to:
Clear the field such that the filter is empty, and then click on ‘Save’.
Presto! The error console shall bug you no more.