Would you like the direct download link for Firefox 78.15.0esr for macOS 10.10.5, or step-by-step instructions for installing Chromium Legacy instead?
A window will pop up showing the Firefox icon and a shortcut arrow pointing to your folder.
Some specialized browsers (like Chromium-based forks) are specifically built to keep older Mac OS versions active. firefox download for mac 10105 upd
Is your older Mac running macOS 10.10.5 Yosemite, and youβre struggling to find a functional, secure web browser? While Safari has long ceased updating on this operating system, remains a viable, secure alternative, provided you use the correct version.
: Open your Applications folder and double-click Firefox. If you see a warning about an app "downloaded from the internet," click Important Tips for Legacy Users Security Risks Would you like the direct download link for Firefox 78
Safari on Yosemite is outdated β many modern websites (banking, streaming, cloud apps) break. Chrome dropped support for 10.10.5 years ago. Firefox ESR remains the for these legacy Macs (MacBook Air 2011, Mac mini 2012, iMac Late 2009, etc.).
According to user reports, some versions of Firefox running on macOS Catalina have experienced occasional menu-related issues, such as problems accessing settings or extension management interfaces. While Mozilla continues to address these issues in subsequent releases, most Catalina users are still able to use the browser effectively without major disruptions. If you encounter any unusual behavior, consider updating to the latest version of Firefox, as newer releases typically include bug fixes that resolve such problems. Is your older Mac running macOS 10
(Change en-US to your language, e.g., de , fr , ja ).
Search for "Firefox 78.0 ESR for Mac" from reliable archive sites or Mozilla's FTP server. Install: Open the downloaded .dmg file.
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