I'm using WordPress 2.5, and in Firefox 188.8.131.52 I'm getting the following message whenever I click on 'Write post':
Warning: Unresponsive script
A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.
If I click on 'Continue' it thinks for a bit, then the same message pops up again. 'Continue' again and it seems to go away.
The problem isn't there when using Safari.
I've posted on this already, but I didn't have as much detail, and got no response - maybe I gave it a bad topic title.