Bug 1102797 describes JavaScript source blackboxing, but there should also be an option to ignore specific log messages independently of where they come from. This may be implemented as a context menu option or via an icon next to a message. When a message is ignored, it is not logged to the console and there may be a hint (e.g. at the top of the Console panel) that messages were filtered out due to ignoring them, maybe with an option to show them retroactively. FWIW, this was already requested for Firebug a long time ago.[1] Sebastian [1] https://github.com/firebug/firebug/issues/4507

So when you ignore a message would it just hide that one, or does it also hide similar / identical ones that happen in the future?

It would also hide identical ones already logged and in the future, maybe also similar ones. Sebastian