If websites don't work on Firefox even if the user agent was changed to Chrome I recommend you to use a privacy preserving browser like ungoogled chromium.
YSK: Your local library's resources. Many offer free e-books and audio books via apps like Hoopla and Libby, resume writing classes, movies, games...and a quiet place to relax of course
https://fosstodon.org/@sirber/111991989076652388