Hey enrsrey1,

Update Firefox on your iOS device like any other app : using the iOS App Store.

Hope it helps you!

Please select the answer that solves the problem. This will help other users with similar problems find the solution.

I need to update my browser on a iox 10.10.5

I believe you mean Mac OS X 10.10 though newer Mac OS is referred to as macOS. The iOS is a mobile OS used on iPhones and older iPads with newer iPads using iPadOS.

from the old "Firefox Mac OS X 10.9, 10.10 and 10.11 users move to Extended Support Release" article. https://support.mozilla.org/en-US/kb/firefox-mac-osx-users-esr

Firefox version 78 was the last supported Firefox version for Mac users of OS X 10.9 Mavericks, OS X 10.10 Yosemite and OS X 10.11 El Capitan.

So the most current version you can run on the old EOL Mac OSX 10.10 is 78.15.0 esr as Fx 79.0 and later requires macOS 10.12 (ten.twelve) at minimum to run. https://archive.mozilla.org/pub/firefox/releases/78.15.0esr/mac/en-US/ other locales https://archive.mozilla.org/pub/firefox/releases/78.15.0esr/mac/

I moved this thread from Firefox for iOS (for iPhone/iPad) to Firefox section.

Update Firefox on your iOS device like any other app : using the iOS App Store.

This is a Mac user. Also there was no iOS 10.10 version (for iPhone/iPad) and current versions of Firefox for iOS requires 13.0 at minimum to run anyways.