Firefox deselects selected text when applying styles after ctrl + a (select all)

[sterlingw]

From what I've seen, this only occurs if the source being edited is not surrounded by tags. More specifically, it happens when "BR on Enter mode" is enabled.

Using Firefox, with BR on Enter mode enabled, add some text to the editor (but no HTML). Then select all using CTRL + A. Apply a style (like bold, italics, or strikethrough). The style is applied, but then the selection is deselected and the cursor moves to the end of the selection. If multiple lines are used, then the cursor moves to the end of the first line.

To better illustrate, here is a screencast: ​http://screencast.com/t/qHwIf8WzNX

[Jakub Ś]

Problem can be reproduced in Firefox only from CKEditor 4.0 beta (works fine in CKE 3.x).

[Jakub Ś]

This is in fact a duplicate of #7830.