Mozilla has launched a new logo for its Nightly web browser. Firefox 57 is currently on the Nightly branch so the new logo will probably ship at the same time that release becomes publicly available.
Quantum flow RSS
Firefox is set to handle tabs in a much more refined fashion after Quantum Flow lands in Firefox 55. In a test opening 1691 tabs (but not loading pages), Firefox 55 did it 30x quicker than Firefox 51.