Thread:VisualEditor/Feedback/VE freeze in Chrome when switching to code editor (2)/reply

This looks like there are a lot of broken scripts in use on French Wikipedia, or perhaps by your user account. That will bring any piece of software to it's knees. You might want to ask a local user that has knowledge of Javascript if he can assist you to clean that up, you should have a lot fewer errors with any of the tools (especially those as complex as VE), if you have no JS errors from other software.