[Web] Typing has huge delay in a document with many lines, especially on firefox

To reproduce:

1. open the quill editor in Firefox.
2. Go to https://loremipsum.de/index_en.html and copy 200 paragraphs.
3. Paste them in the editor. 
4. Try to type text in the Editor.


Is there anything I can do to remove or at least reduce the lag when typing?


