Since this morning, Nightly no longer seems to let me delete text in Google Docs. Neither "Delete" nor "Backspace" cause anything to happen. Selecting text also appears not to work although that may be unrelated. I can continue to add text by typing as normal, but deleting existing text is impossible. This appears to occur on my personal account as well as on my @mozilla.com account.

Oops, this is probably a duplicate of bug 1442528.