[Nadya]

Unless the user is using IE11. A perhaps not-so-modern but still a mainstream and typically supported browser. But if you're going to specify "old Debian" I think it would be fair to expect it to work on "old browsers" as well. But I think it would be silly to expect it to work in IE 5 anymore than some modern programs working in some old flavor of a Debian distro with outdated libraries.

At some point, like people do with dated web browsers, developers need to tell users they need to update as the developer won't be supporting such outdated software anymore.