All Platforms

• Updated Firefox to 128.5.0esr
• Updated uBlock Origin to 1.61.0
• Rebase Mullvad Browser stable onto Firefox 128.5.0esr [mullvad-browser]
• Backport security fixes from Firefox 133 [tor-browser]

macOS

• Bug 43165: Disable Microsoft SSO on macOS [MozBug 1768724] [tor-browser]

Build System

All Platforms

• Do not version the .nobackup files [tor-browser-build]
• Update relprep.py script to not synchronise changelogs between channels [tor-browser-build]
• Add bea, clairehurst, and jwilde to tb_builders [tor-browser-build]
• Fix the Mullvad Extension update in relprep.py [tor-browser-build]