Once downloaded:
Old browsers run slow on modern ad-heavy websites. Firefox 78 ESR supports legacy extensions. Go to https://addons.mozilla.org and search for . Install it immediately. This will dramatically speed up your browsing. firefox download for mac 10.10.5
If you attempt to use the default Safari browser on Yosemite today, you will quickly run into issues. Safari 10.1.2 (the final version for Yosemite) cannot render many modern websites correctly, and more importantly, it no longer receives security updates. This makes browsing the internet a risky endeavor. Once downloaded: Old browsers run slow on modern