Firefox version 78 is 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. These users will be moved to the Firefox Extended Support Release (ESR) channel by an application update. This will provide security updates until the next ESR update in July 2021, after which the affected users will no longer receive security updates. Mozilla Firefox is a web browser that offers users ease of use and security. It is designed to support HTML5, Javascript, and WebGL. It focuses a lot on user preferences, saving frequently-visited sites, and keeping track of sites that users favorite.
Functions can be added through add-ons, created by third-party developers, of which there is a wide selection, a feature that has attracted many of Firefox's users. Mozilla Firefox is a cross-platform browser, providing support for various versions of Microsoft Windows, Mac OS X, and Linux. Firefox Features. Improved Tabbed Browsing; Spell Checking. While the developer is fixing the problem, try using an older version. If you need the previous version of Firefox, check out the app's version history which includes all versions available to download. Download prior versions of Firefox for Mac. All previous versions of Firefox are virus-free and free to download.
If you are on a Windows computer, see Install an older version of Adobe Reader | Windows.
Installing Adobe Reader is a two-step process. First you download the installation package, and then you install Adobe Reader from that package file.
Before you install, make sure that your system meets the minimum system requirements.
Note:
If you're running Mac OS X 10.9 or later, install the latest version of Reader. For step-by-step instructions, see Install Adobe Acrobat Reader DC on Mac OS.
Select your operating system, a language, and the version of Reader that you want to install. Then click Download now.
When asked whether to open or save the .dmg file, select Save File, and then click OK.
Important: If you do not see this dialog box, another window could be blocking it. Try moving any other windows out of the way.
Double-click the .dmg file. If you don't see the Downloads window, choose Tools > Downloads.
If the download package doesn't appear in the Downloads window and a Thank You screen remains visible, click the download link on the Thank You screen.
Double-click the Adobe Reader [version] Installer.pkg to start the installation.
If a dialog box appears telling you to quit Reader, close Reader, and then click OK.
When the Install Adobe Reader dialog box appears, click Continue. Follow the onscreen instructions to install Reader.
Note:
If you're running Mac OS X 10.9 or later, install the latest version of Reader. For step-by-step instructions, see Install Adobe Acrobat Reader DC on Mac OS.
Select your operating system, a language, and the version of Reader that you want to install. Then click Download now.
If a dialog box appears telling you to quit Reader, close Reader, and then click OK.
When the Install Adobe Reader [version] dialog box appears, click Continue. Follow the onscreen instructions to install Reader.
When the Install Succeeded window appears, click Close.
To see if other users are experiencing similar download and installation problems, visit the Acrobat Reader forum, or the Deployment & Installation forum on AcrobatUsers.com. Try posting your problem on the forums for interactive troubleshooting. When posting on forums, include your operating system and product version number.
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