Prior to FF140 the context menu button labels left placeholders on the left that aligned the labels with extension buttons. Currently the labels moved to the left edge, which is a bit annoying after them being in the same place for years. Was this a planned change or is this a bug I should report to bugzilla? Curiously, if there is at least one item with a checkbox (e.g. this textbox) all items return to their old alignment. I find that even more distracting.