I’m seeing more webpages entirely break on Firefox recently. I tend to reach for Vivaldi when I need to try a different browser, as it’s Chromium without all the tracking.
Yes, on newer versions, this can happen when Tracking Protection is enabled. This feature causes things like CAPTCHA and other third-party scripts to break. When this occurs, look for a shield icon in the URL bar to the left of the green TLS padlock. Click it and disable Tracking Protection. This has fixed every site issue I've seen so far.