Starting with Firefox version 49, Firefox requires Mac OS X 10.9 (Mavericks) or higher. Visit this Apple Support page to find your Mac OS version.
TO INSTALL ADOBE FLASH PLAYER ON A MAC OS X 10.11.6 COMPUTER. IT HAS SAFARI 9.13 (11601.7.8). To update Flash, go to the Adobe Flash Player download site and select Mac from the download options. Download and run the installer. Update the Mac's drivers by clicking on the Apple icon in the menu and selecting 'Software Update.'
If you're using an outdated version of Firefox on Mac OS X 10.8 (Mountain Lion) or earlier, the only way you can update Firefox to a secure version is to upgrade your Mac OS to a version that Apple supports. Visit this Apple Support page to learn more about upgrading your Mac.
Firefox Download Mac
While insecure versions of Firefox will continue to work on OS X 10.8 and earlier, using an up-to-date version of Firefox on a supported version of Mac OS will provide you with the best and safest user experience.
Starting with Firefox version 62 for Mac, Adobe Flash applets will be run in a more secure mode using process sandboxing.
The sandbox is known to prevent the following features from working:
Firefox Download Mac 10.6.8
- Print to PDF from the Flash print dialog
- Print to Open in Preview from the Flash print dialog
- Quicklook in the File -> Open menu
- Saving files from a Flash applet
- Flash applets downloading and running the Adobe Air installer
- Flash triggering Adobe Air applications to run
To disable the Flash sandbox in Firefox, follow these steps:
- Type about:config in the address bar and press EnterReturn.
A warning page may appear. Click to continue to the about:config page. - Find the preference dom.ipc.plugins.sandbox-level.flash and double-click itclick the Edit button.
- Enter an integer value of 0 (zero) and click on the checkmark to save the change.
- Quit and reopen Firefox so that the change will take effect.