Mozilla explained what could happen if users don’t update by saying, “On March 14, 2025, a root certificate used to verify signed content and add ons for various Mozilla projects, including Firefox, will expire. Without updating to Firefox version 128 or higher or ESR 115.13+ for ESR users, including Windows 7 8 8.1 and macOS 10.12–10.14 users, this expiration may cause significant issues with add ons , content signing and DRM protected media playback. If you don’t...
