You have the latest version of Firefox for PPC Macs and for 10.4.11, the Firefox 4+ versions require Intel and 10.5.8 or higher. For older Macs that aren't supported in Firefox 4 thru 8, try TenFourFox for PowerPC's running Mac 10.4.11 & 10.5.8. Jan 10, 2020 Unlike updating apps from the Mac App Store or updating macOS system software in System Preferences, updating Firefox is done directly within the Firefox application itself. How to Update Firefox Web Browser on Mac. Here’s how to update Firefox on MacOS: From the opened Firefox browser, pull down the ‘Firefox’ menu and choose “About. If you need a rollback of Firefox, check out the app's version history on Uptodown. It includes all the file versions available to download off Uptodown for that app. Download rollbacks of Firefox for Mac. Any version of Firefox distributed on Uptodown is completely virus-free and free to download at no cost.
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- Firefox support has ended for Mac OS X 10.6, 10.7 and 10.8 This article applies to Mac users only. Starting with Firefox version 49, Firefox requires Mac OS X 10.9 (Mavericks) or higher.
- Download Mozilla Firefox, a free web browser. Firefox is created by a global not-for-profit dedicated to putting individuals in control online. Get Firefox for Windows, macOS, Linux, Android and iOS today!