To disable the url's punycode in firefox or librewolf:

1. go to about:config
2. apply next values:

• network.IDN_show_punycode –> false
• browser.urlbar.decodeURLsOnCopy –> true (this is when you copy/paste full url)

we do not change the value of network.idn.punycode_cyrillic_confusables –> true to avoid confusion with some Russian chars