• Firefox Mac 49.0.2
• Firefox For Mac 10.9.5
• Download Firefox For Mac 47.0.1
• Firefox For Mac 10.15.4

Mozilla Firefox is one of the most popular browser choices, offering high speeds and displays versatility when you add plugins. The program is extremely light on your computer resources.

Keep your Firefox bookmarks on Windows up to date with your Safari bookmarks on iPhone, iPad, and Mac with the iCloud Bookmarks extension for Firefox. ICloud stores your website bookmarks, so they are everywhere you go — on your iPhone, iPad, iPod touch, Mac, and PC. Firefox Lockwise. Take the passwords you’ve saved in Firefox with you everywhere. Download for iOS; Download for Android; Support; Firefox Monitor. See if your personal info has been leaked online, and sign up for future breach alerts.

Before Chrome, there was Firefox

Experience a fast and reliable browser that is versatile and feature-rich when you use Mozilla Firefox.

You’ve probably heard of Mozilla Firefox, one of the most used desktop browsers available. Firefox competes with other popular browsers such as Google Chrome and Opera Browser. Arguably, Mozilla offers the fastest speeds available for browsing the web.

Internet browsers are notorious for eating your computer’s resources. This is especially visible in Google Chrome’s consumption of almost all of a computer’s RAM. However, Mozilla Firefox is lightweight, meaning it won’t consume all of your computer’s resources. It uses thirty percent less memory than Chrome does. Yet, speed and performance is not sacrificed by this software being lightweight.

Your privacy is ensured when you use Mozilla Firefox, the security features on this program include anti-tracking to ensure your location stays hidden. However, you’ll find that there are fewer extensions available for Firefox compared to Chrome. There’s also no live support to answer any queries you may have.

When you’re browsing the Internet, you may want to save a few websites, which is a great idea. However, you may regret doing this as bookmarks you’ve made are hard to find. Unless you organize the tab constantly you won’t be able to view your old bookmarks easily. But, for all the bad in this application, it’s speed and compatibility with most systems makes up for its shortcomings.

Where can you run this program?

Firefox is available for Windows, Mac, Linux, Android, and IOS devices.

Is there a better alternative?

No, when it comes to browsers you can’t expect a one-size-fits-all solution. You’ll need to take a look at everything and decide what features you want more than others.

Our take

Mozilla Firefox is a great browser that’s lightweight and offers high speeds. Yet by offering these, it doesn’t compromise on security and privacy.

Should you download it?

Yes, if you’re looking for a fast, system-friendly and versatile browser then this is the optimal choice for you. Offering extension support means you’ll be customizing Mozilla to your personal needs.

67.0.4

Most problems with Firefox can be fixed by following the troubleshooting methods described below. Try these steps in order. If one doesn't work, move on to the next one. If you need extra help with any of this, we have a community of volunteers standing by.

Table of Contents

• 7Other solutions

Sometimes problems can be fixed by simply restarting your computer and then starting Firefox again.

Many problems with loading web pages can be resolved by clearing Firefox's cookies and cache:

1. Click the Library button on your toolbar. (If you don't see it there, click the menu button then click Library.) Click and select .
2. In the Time Range to clear: drop-down, select Everything.
3. Below the drop-down menu, select both Cookies and Cache. Make sure other items you want to keep are not selected.
4. Click .

Firefox Mac 49.0.2

Firefox Safe Mode is a troubleshooting mode that disables extensions, uses the default theme, turns off hardware acceleration and uses default toolbar settings, among other changes (see this article for details). To start Firefox in Safe Mode:

1. Click the menu button , click Help and select Restart with Add-ons Disabled…. Firefox will start up with the Firefox Safe Mode dialog.
   Note: You can also start Firefox in Safe Mode by holding down the shift key while starting Firefox.holding down the option key while starting Firefox.quitting Firefox and then going to your Terminal and running: firefox -safe-mode
   You may need to specify the Firefox installation path (e.g. /usr/lib/firefox)
2. In the Firefox Safe Mode dialog, click .
3. Check whether your problem is still happening while in Safe Mode.

• If the problem still happens in Safe Mode, go on to step 4.
• If the problem does not happen in Safe Mode, see Turn content blocking off on individual sitesWhat to do if a site seems broken, if certain websites only work correctly while in Firefox Safe Mode. For other issues, follow these instructions to troubleshoot extensions, themes and hardware acceleration.

Some Firefox issues can be caused by a problem with one of the Firefox program files. Follow these steps to completely remove and reinstall Firefox. This process will not remove your Firefox profile data (such as bookmarks and passwords), since that information is stored in a different location.

1. Download and save the installer for the latest official version of Firefox from mozilla.org.
2. Exit Firefox (if open): Click the Firefox menu and select Exit.Click the Firefox menu at the top of the screen and select Quit Firefox.Click the Firefox menu and select Quit.
3. You may want to make a note of the Mozilla Firefox program folder location (right-click the Firefox desktop icon, select Properties from the context menu and click the Shortcut tab) since there may be leftover files and folders after you uninstall Firefox that should be removed for a clean reinstall.
4. Uninstall Firefox from your computer.
5. Delete the Firefox program folder, which is normally found in one of these locations by default:
   • C:Program FilesMozilla Firefox
   • C:Program Files (x86)Mozilla Firefox
6. Reinstall Firefox using the installer you downloaded earlier - see How to download and install Firefox on Windows for instructions.

1. Download the latest official version of Firefox from mozilla.org.
2. Quit Firefox: Click the Firefox menu and select Exit.Click the Firefox menu at the top of the screen and select Quit Firefox.Click the Firefox menu and select Quit.
3. Uninstall Firefox from your computer by opening the Applications folder in the Finder and dragging the Firefox application to the Trash.
4. Reinstall Firefox - see How to download and install Firefox on Mac for instructions.

1. Download the latest official version of Firefox from mozilla.org.
2. Quit Firefox: Click the Firefox menu and select Exit.Click the Firefox menu at the top of the screen and select Quit Firefox.Click the Firefox menu and select Quit.
3. Uninstall Firefox - If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see Install Firefox on Linux for details. If you downloaded and installed the binary package from the Firefox download page, simply remove the folder firefox in your home directory to uninstall Firefox.
4. Reinstall Firefox - see Install Firefox on Linux for instructions.

Now start Firefox and check to see if your problem has been fixed. If it hasn't, continue with the next troubleshooting method.

The Refresh Firefox feature can fix many issues by restoring your Firefox profile to its default state while saving your essential information.

Firefox For Mac 10.9.5

1. Click this Refresh Firefox button directly, if you are viewing this page in Firefox. This won't work if you are using a different browser or a mobile device.
   • You can also find a Refresh Firefox button at the top of the Firefox about:supportTroubleshooting Information page.
2. To continue, click in the confirmation window that opens.
3. Firefox will close to refresh itself. When finished, a window will list your imported information. Click and Firefox will open.

Sometimes files in your Firefox profile folder that correspond to the essential information that a Firefox Refresh doesn't remove (such as bookmarks and browsing history) may be causing the issue. You can create a new, additional profile which will not contain any of your old Firefox data. See the Profile Manager - Create, remove, or switch Firefox profiles article for instructions.

If you've tried all of these troubleshooting methods and you're still having problems, here are some other solutions you can try:

Check browser internals

The Firefox Task Manager (about:performance page) lets you see what tabs or extensions are slowing down Firefox. Telemetry Data shared with Mozilla (about:telemetry page) contains detailed data about performance, hardware, usage and customization. The Troubleshooting Information page (about:support page) includes other about: page links and troubleshooting resources. (For a list of all about: pages, enter about:about in the address bar.)

Troubleshoot the Flash plugin

See Flash Plugin - Keep it up to date and troubleshoot problems.

Check for conflicts with your Internet security software

Some Internet security software (including antivirus, antispyware, and firewall programs) can cause problems with Firefox including blocking it from opening websites, crashes, and more. Often you can open the program's settings, remove Firefox from its list of allowed or trusted programs and it will be re-detected and things should start working again. If your program is listed at the Configure firewalls so that Firefox can access the Internet article, you can get specific instructions for how to properly reconfigure it.

Check for malware

Download Firefox For Mac 47.0.1

Malware (short for 'malicious software') can cause problems with Firefox. Periodically, you should scan your system for viruses, spyware, or other malware. For more information, see Troubleshoot Firefox issues caused by malware.

Firefox For Mac 10.15.4

Based on information from Standard diagnostic - Firefox (mozillaZine KB)