I’ve noticed that the post authoring interface slows way down if a tab stays open for more than an hour or so. The post authoring interface itself doesn’t need to be open during this time.
When using a tab that was open for the last three or four hours (not including time the laptop was closed, but still the same browser session) I had a good 3 to 4 seconds of input latency while typing and every entered letter had a staggered delay before the next one would appear. All in all it took about a minute and a half for a post with two sentences to type itself out.
Closing and reopening the tab made the problem go away immediately.
I have not noticed this issue on my desktop computer, only on a laptop. It’s also possible that the slowdown has to do with closing the lid of the laptop and reopening it a few times.
Using a laptop running Windows 11. Firefox 152.0.4.