I am creating a Chrome extension but just found out that it's not possible to use non-ascii characters in the regex filter of the declarativeNetRequest API. Which I need because I want to use it to match and block all requests to domains with TLD рф and дети. Is there any solution for this?

I currently use a block action in a ruleset specified with the following condition and this works fine:

"condition": {"regexFilter": "^(.*):\/\/(.*).(ru|su|tatar)\/(.*)", "resourceTypes": ["main_frame"] }

However, I still want to add TLDs рф and дети. I tried using a Unicode-encoded representation of that in the regex too but it also didn't work. So, how to use non-ascii characters in the regex filter of the declarativeNetRequest API for a Google Chrome extension? Or is there an alternative approach to achieve this?

Side-note: I feel like this question belongs more the "Web Applications" Stack Exchange, however considering the tag google-chrome-extensions has 27.000+ questions on StackOverflow and less than 100 questions on WebApps Stack Exchange I think it's more effective to post it here .