Issue Summary

If we edit a page with a lot of content in Firefox and try to mark a word in its content as bold the editor will return to the top of the page.
The issue is happening in versions below 7.x only in Firefox (we have tested versions 88 and 89).

Steps to Reproduce

1. Create a new page in Confluence and add a large amount of text.
2. Save the page.
3. Edit the page and scroll down to the middle of the page, and select a word and select the bold option.
4. The editor will load the page from the top.
5. In Confluence 7.x, the editor will load from where the page was last.

Expected Results

The editor should not change its position while the text is being edited.

Actual Results

The editor jumps back to the top of the page.

Workaround

The customer can use Google Chrome instead to avoid this issue.