Thats the nice thing about alternate frontends like Nitter, if the main instance goes down you can just clone the repo and make your own very easily, or choose from one of the many alternate instances out there.

I highly recommend the extension libredirect, which will redirect you to instances of your choice (or just stick with the defaults). It doesn't just work for Twitter/X, but also Reddit, Tiktok, Youtube, and many others

Firefox - https://addons.mozilla.org/en-US/firefox/addon/libredirect/ Chromium Instructions - https://github.com/libredirect/browser_extension