https://www.mozilla.org/en-US/firefox/android/68.10.0/releasenotes/ 未更新
7/1 追記
Version 68.10.0, first offered to Release channel users on June 30, 2020
Fixed Various stability and security fixes
security fixes なので配布を早めましたってことか?
https://www.mozilla.org/en-US/security/known-vulnerabilities/firefox-esr/#firefoxesr68.10 未更新
追記終わり
7/8 追記
Security Vulnerabilities fixed in Firefox ESR 68.10 - Mozilla Foundation Security Advisory 2020-25
追記終わり