Greasy Fork is available in English.
Stops most (not all) anti-debugging implementations by JavaScript obfuscators and stops the console logs from being automatically cleared.
Have you followed the steps below?
1 Open dev tools in a new window, otherwise sites may detect using viewport width/height information.
2 Disable source maps in dev tools. Some sites will detect when source maps are automatically loaded through the dev tools.
3 Open dev tools first, and then navigate to the site
Doesn't work on https://ogladajanime.pl/anime/owari-no-seraph-the-beginning-of-the-end