Firefox ESR 115 support extended until the end of August 2026

From <https://whattrainisitnow.com/release/?version=esr>:

  > We have decided to extend support to ESR 115 only on Windows 7-8.1 and macOS 10.12-10.14 up to August 2026.
  > We will re-evaluate this decision in July 2026 and announce any updates on ESR 115's end-of-life then.