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Prithee, might one of you be able to point me in the right direction with regard to modifying a browser error message, specifically a DNS error/site not found message? Here's the rub... in an effort to prevent use of our OPACs as public access computers, I've modified their DNS settings so that they only look to themselves for DNS queries. In their hosts file, I only added entries for our catalog, our website and our museum pass reservation site. So this effectively prevents access to all other sites (unless of course someone happens to know the IP address of another site). The problem is that the browser returns the DNS error/site not found message, and there are no browser controls to go back since it's in kiosk mode. We have a label advising patrons to press ALT← to go back to the previous page, but what I'd like to do is use a hex editor to modify the default browser error to communicate the same thing. So my question is, does anyone know where I can find those messages so I can edit them? I've searched all sorts of Firefox files to no avail so far. I'm not completely averse to using a different browser, although my preference is to *not* use Chrome or Edge. I also realize that whatever string I replace the error message with, it must be the same length (this brings back memories of working at Prodigy and editing command.com in MS-DOS so that it would return Bad command, you idiot!!). hmmm... as I write this, now I'm thinking of utilizing a redirect page of some sort, one that displays advice to the patron, then returns to wherever. Thanks much! John Lolis Coordinator of Computer Systems 100 Martine Avenue White Plains, NY 10601 tel: 1.914.422.1497 fax: 1.914.422.1452 https://whiteplainslibrary.org/ *“I would rather have questions that can’t be answered than answers that can’t be questioned.”* — Richard Feynman <https://click.fourhourmail.com/5qure95xkf7hvvo93wh2/7qh7h8h05vr4zrtz/aHR0cHM6Ly9lbi53aWtpcGVkaWEub3JnL3dpa2kvUmljaGFyZF9GZXlubWFu>, theoretical physicist and recipient of the Nobel Prize in Physics in 1965