📝 Provide detailed reproduction steps (if any)
- Open the CKEditor 5 image demo page at https://ckeditor.com/docs/ckeditor5/latest/features/images/images-overview.html in Firefox 109.0.1
- Click the image and drag it around the document
✔️ Expected result
The caret should move around the page quickly to show where the image will be dropped
❌ Actual result
The caret moves extremely slowly, lagging behind the movement of the cursor by several seconds
📃 Other details
This issue may be related to changes to dataTransfer.files in Firefox - https://bugzilla.mozilla.org/show_bug.cgi?id=1812611
Here's the stack chart while dragging the image:

- Browser: Firefox 109.0.1
- OS: macOS 12.6.2
If you'd like to see this fixed sooner, add a 👍 reaction to this post.
📝 Provide detailed reproduction steps (if any)
✔️ Expected result
The caret should move around the page quickly to show where the image will be dropped
❌ Actual result
The caret moves extremely slowly, lagging behind the movement of the cursor by several seconds
📃 Other details
This issue may be related to changes to
dataTransfer.filesin Firefox - https://bugzilla.mozilla.org/show_bug.cgi?id=1812611Here's the stack chart while dragging the image:
If you'd like to see this fixed sooner, add a 👍 reaction to this post.