Well, one of the known problem of our builtin editor is, we don't remove `<br>` which is automatically inserted even when it becomes unnecessary. If it's not enough for some web apps, we need some big changes about the white-space handling to stop inserting `<br>` except in an empty block.
Bug 1615852 Comment 19 Edit History
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Well, one of the known problem of our builtin editor is, we don't remove `<br>` which is automatically inserted even when it becomes unnecessary. If fixing it is not enough for some web apps, we need some big changes about the white-space handling to stop inserting `<br>` except in an empty block.