Investigate how we could improve the error message when browsing LAN from usual Tor Browser

Once we restricted LAN from being accesses using Tor Browser it might be interesting to display the user a better error message than “Unable to connect”.

Note that this is the current situation with Tor Browser and we could work with them on improving this.

Maybe that could be done through an extension.

If we come up with a nice way of overwriting the errors messages of Firefox, we might as well solve #8061 with the same technique.

Subtasks

#8712 (closed)
#9466 (closed)

Related issues

Related to #9473

Original created by @sajolida on 8711 (Redmine)

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