@FediTips

If using multiple accounts on one instance, Firefox Multi-Account Containers allows using all of those at once. I believe my instance does not have an official account switcher.

Another reason I have multiple accounts is because I follow Japanese artists, who tend to be on instances that tend to have visibility limited by some instances. And even if they aren't, I still prefer to use a Misskey or Sharkey account so I can better engage with the reactions feature on those instances.