I have been coding for a while in Fire and I noticed it occasionally has trouble with copy pasting text from the clipboard. Where I paste some text and the editor moves lines down or up and messes up the code. I will try if I can reproduce the problem somehow but so far I haven’t found reproducible steps. I am not sure if it’s related to the use of Undo but I am getting the feeling it might be.
@mh Have you experienced this too?