Beyond compatibility, Firefox 78.0.1 introduced several modern web features to older Macs:
Accessible via about:protections , this tool provides consolidated reports on password management, data breaches, and tracking protection. firefox 78.0.1 download mac
While Mozilla encourages users to use the latest Firefox version for the best security, you can still find the 78.0.1 installer in official and community archives: Source Type Link/Location Index of /pub/firefox/releases/78.0.1/mac/ English (US) Direct Firefox 78.0.1.dmg (en-US) Community Repositories Macintosh Repository (Legacy Archive) System Requirements for Mac Beyond compatibility, Firefox 78
A new "Refresh" button was added to the uninstaller to help users fix performance issues without a full reinstallation. Official Download Sources Released on July 1, 2020 , this version
is a critical legacy version for Mac users, as it represents the final major release supporting several older Apple operating systems . Released on July 1, 2020 , this version served as a rapid patch to fix a specific bug that caused search engines to disappear during upgrades. Why Mac Users Need Firefox 78.0.1
It officially disabled TLS 1.0 and 1.1 , requiring sites to support TLS 1.2 or higher for improved connection security.