I got a iPhone 18 Pro Max and installed ios 27. Firefox is extremely laggy now. I alreasy re-installed Firefox, but the the problem ist still there.

Hi nmgg,

I’ve also upgraded to iOS 27 and haven’t experienced any issues. Could you clarify whether the problem occurs on all websites or only on specific ones?

In the meantime there was an updated released. Now it’s slightly better, bur still not normal.

If I enter text in forms etc. it’s still laggy.

I also have the bug if I retrieve from the cache Firefox opens a new tab. That sucks really.

Since iOS 27 is still relatively new, I expect we'll continue iterating and improving the experience over time.

If the issue is significantly affecting your experience, would you mind filing a bug report on GitHub? It would be especially helpful for the report to come directly from someone experiencing the issue, since you'll be able to provide the most accurate details about what you're seeing and help the team investigate.