There is no Firefox support for Mac OS X 10.6, 10.7 and 10.8. Firefox Editions Beta. The Beta version is unstable, and the platform is still in the testing and development phase and sends data to Firefox about any issues encountered. Be the first to check out the features of the next-generation web browser. Our website provides a free download of Firefox Nightly 14.0 for Mac. The software lies within System Tools, more precisely Benchmark. This free Mac app was originally created by Mozilla. Free download Firefox Nightly Firefox Nightly for Mac OS X. Firefox Nightly - Nightly is a experimental and may be unstable. Running WebVR on macOS with Firefox Nightly More than 20% of Hacks readers (on desktop) and a quarter of web developers accessing the Mozilla Developer Network are on macOS. Many developers go to great lengths to test and develop in familiar environments and platforms.

Firefox Nightly for Mac 80.0a1: Get the latest, untested version of Firefox while it’s still warm.

All of the changes you make in Firefox, like your home page, what toolbars you use, extensions you have installed, saved passwords and your bookmarks, are all stored in a special folder, called a profile. Your profile folder is stored in a separate place from the Firefox program so that, if something ever goes wrong with Firefox, your information will still be there. It also means you can uninstall Firefox without losing your settings and you don't have to reinstall Firefox to clear your information or troubleshoot a problem.

Table of Contents

• 1How do I find my profile?

• Click the menu button , click Help and select Troubleshooting InformationMore Troubleshooting Information.From the Help menu, select Troubleshooting InformationMore Troubleshooting Information. The Troubleshooting Information tab will open.
• Under the Application Basics section next to Profile FolderDirectory, click . A window will open that contains your profile folder.Your profile folder will open.

Finding your profile without opening Firefox

Firefox stores your profile folder in this location on your computer, by default:
C:Users<your Windows login username>AppDataRoamingMozillaFirefoxProfiles
Windows hides the AppData folder by default but you can find your profile folder as follows:

1. Press +R on the keyboard. A Run dialog will open.
2. Type in:
   %APPDATA%MozillaFirefoxProfiles
3. Click . A window will open containing profile folders.
4. Double-click the profile folder you wish to open. If you only have one profile, its folder would have 'default' in the name.

1. From the Start Screen, click the Desktop tile. The Desktop view will open.
2. From the Desktop, hover in the lower right-hand corner to access the Charms.
3. Select the Search charm. The Search sidebar will open.
4. In the search box, type in:
   %APPDATA%MozillaFirefoxProfiles
   without pressing Enter. A list of profile folders will appear.
5. Click on the profile folder you wish to open (it will open in a window). If you only have one profile, its folder would have 'default' in the name.

1. Click the Windows button. The Start menu will open.
2. In the Search box at the bottom of the Start menu, type:
   %APPDATA%MozillaFirefoxProfiles
   without pressing Enter. A list of profiles will appear at the top of the Start menu.
3. Click on the profile folder you wish to open (it will open in a window). If you only have a single profile, its folder would have 'default' in the name.
   

• Alternatively, you can find your profile by pressing the key and then start typing: %APPDATA%MozillaFirefoxProfiles

1. Click the Windows button, and select Run….
   
2. Type in:
   %APPDATA%MozillaFirefoxProfiles
   then click .
   A window will open containing profile folders.
   
3. Double-click the profile folder you wish to open. If you only have one profile, its folder would have 'default' in the name.

1. Click the Finder icon in the dock. On the menu bar, click the Go menu, hold down the option or alt key and select Library. A window will open containing your Library folder.
2. Open the Application Support folder, then open the Firefox folder, and then the Profiles folder.
3. Your profile folder is within this folder. If you only have one profile, its folder would have 'default' in the name.

1. (Ubuntu) Click the Places menu on the top right of the screen and select Home Folder. A File Browser window will appear.
2. Click the View menu and select Show Hidden Files if it isn't already checked.
3. Double click the folder marked .mozilla.
4. Double click the folder marked firefox. Your profile folder is within this folder. If you only have one profile, its folder would have 'default' in the name.

Bookmarks, Downloads and Browsing History:

• places.sqlite
  This file contains all your Firefox bookmarks and lists of all the files you've downloaded and websites you’ve visited.
• bookmarkbackups
  This folder stores bookmark backup files, which can be used to restore your bookmarks.
• favicons.sqlite
  This file contains all of the favicons for your Firefox bookmarks.

For more information, see Bookmarks in Firefox and Restore bookmarks from backup or move them to another computer.

Passwords:

Firefox Developer Edition

• key4.db
• logins.json
  Your passwords are stored in these two files. For more information, see Password Manager - Remember, delete and edit logins and passwords in Firefox.

Site-specific preferences:

• permissions.sqlite
• content-prefs.sqlite
  These two files store many of your Firefox permissions (for instance, which sites are allowed to display popups) or zoom levels that are set on a site-by-site basis (see Font size and zoom - increase the size of web pages).

Search engines:

• search.json.mozlz4
  This file stores user-installed search engines. For more information, see Add or remove a search engine in Firefox.

Personal dictionary:

• persdict.dat
  This file stores any custom words you have added to Firefox's dictionary. For more information, see How do I use the Firefox spell checker?.

Autocomplete history: Macdown github.

• formhistory.sqlite
  This file remembers what you have searched for in the Firefox search bar and what information you’ve entered into forms on websites. For more information, see Control whether Firefox automatically fills in forms.

Cookies:

• cookies.sqlite
  A cookie is a bit of information stored on your computer by a website you’ve visited. Usually this is something like your site preferences or login status. Cookies are all stored in this file.

DOM storage:

DOM Storage is designed to provide a larger, more secure, and easier-to-use alternative to storing information in cookies.

• webappsstore.sqlite
  Information is stored in this file for websites
• chromeappsstore.sqlite
  This file stores information for about:* pages.

Extensions:

• extensions
  This folder, if it exists, stores files for any extensions you have installed. To learn more about Firefox extensions and other add-ons, see Find and install add-ons to add features to Firefox.

Security certificate settings:

• cert9.db
  This file stores all your security certificate settings and any SSL certificates you have imported into Firefox.

Security device settings:

• pkcs11.txt
  This file stores security module configuration.

Download actions:

• handlers.json
  This file stores your preferences that tell Firefox what to do when it comes across a particular type of file. For example, these are the settings that tell Firefox to open a PDF file with Acrobat Reader when you click on it. For more information, see Change what Firefox does when you click on or download a file.

Stored session:

• sessionstore.jsonlz4
  This file stores the currently open tabs and windows. For more information, see Restore previous session - Configure when Firefox shows your most recent tabs and windows.

Toolbar customization:

• xulstore.json
  This file stores toolbar and window size/position settings. For more information, see Customize Firefox controls, buttons and toolbars.

User preferences:

• prefs.js
  This file stores customized user preference settings, such as changes you make in Firefox OptionsPreferencesSettingsPreferences dialogs. The optional user.js file, if one exists, will override any modified preferences.

Containers:

• containers.json
  This file stores the details of containers used by the Container Tabs feature, including those created by extensions such as Facebook Container.

• Profile Manager - Create, remove, or switch Firefox profiles explains how to do things like, create a new profile, set a new default profile and delete an old profile.
• Recover user data missing after Firefox update explains how to use the Profile Manager to switch profiles, if multiple profiles exist.
• Back up and restore information in Firefox profiles explains how to back up and restore a profile. It also explains how to move your profile information to a different location on your hard drive or to another computer.
• Recovering important data from an old profile explains how to copy files to a new profile and includes a list of files that store information useful for recovery.

The world's most popular open-source browser, designed for users who want a customizable, feature-rich alternative to Safari that still takes privacy seriously

What's new in Firefox 88.0:

• New:
• PDF forms now support JavaScript embedded in PDF files. Some PDF forms use JavaScript for validation and other interactive features.

By far the most popular open-source browser, Firefox has attempted, since it was first developed, to counter the dominance of Internet Explorer, then Chrome, and now the multitude of Chromium-based browsers as well.

Seemingly doomed to never be the top dog, Firefox is nevertheless an impressive browser, and its commitment to transparency and user privacy makes it a sound choice. Other than Safari, it is the only major browser not to be powered by Chromium, relying on the in-house Gecko engine ever since its inception.

What's new?

For M1 Mac users, the biggest recent news is native support for Apple Silicon processors. All Firefox editions are now released as universal binaries, offering improved performance on the new devices, which until now relied on Rosetta 2 emulation.

With Firefox 85, Adobe Flash is no longer supported, and it is impossible to enable it on any website. If the sites you're visiting still require Flash, it's probably wise to avoid them anyway.

Feature-rich, as expected

Aside from the things you need for actual browsing, Firefox comes equipped with a password manager, tracker blocker, private browsing functionality, fingerprint blocking, cross-device synchronization, and fairly impressive customization options.

Of course, nowadays, feature availability isn't much of a concern when choosing a browser, at least for most people. Sure, Firefox doesn't have a built-in ad-blocker or full-page translation, but these things can be added via extensions.

Open-source, privacy-minded browser

One of the main reasons to choose Firefox is the fact that it is completely open-source. Every day we get more reasons not to trust big corporations to do the right thing, and what better way to keep an eye on them than to see everything that's going on behind the scenes?

Mozilla is also at the forefront of safeguarding user privacy and promoting transparency. Aside from blocking cross-site tracking cookies and preventing all tracking in private windows, the browser also prevents fingerprinting, which lets companies create a profile based on your hardware and data, allowing them to track you for extensive periods.

Firefox has also implemented an HTTPS-only mode, which blocks all unsecure connections. However, you will need to enable this feature after installing the browser, as it is not turned on by default.

Plenty of extensions to choose from, but Chrome is still better in this regard

Firefox has been around for a long time, so it makes sense that tons of extensions have been created since the browser was first released. However, those that have not been upgraded since the introduction of the Quantum engine will likely not work on later versions of the app. Mind you, that was over three years ago, so it's not much of an issue today.

Despite the fact that Chrome came onto the scene quite a bit later, its sheer popularity has resulted in far more extensions being created for Google's browser. Nevertheless, almost every popular add-on is available for Firefox as well, and it is vastly superior to Safari in this respect.

Performance — there's no beating Safari

Whether on Intel or Apple Silicon Macs, Safari is superior to all other major browsers when it comes to page load times, general performance, and RAM usage. If you're looking for an alternative to Apple's browser, it's not because of performance issues or resource consumption.

Between the alternatives, however, it's a toss-up. Firefox and Chrome seem to trade the title of 'faster browser' on a regular basis, but they're always close. Given that most users don't want to switch to a different browser with every new release, it's probably wiser to discount performance as a factor for the time being. Most major browsers are similar enough for it to not matter all that much.

Firefox, Chrome, or Safari?

Mac users are somewhat fortunate in having the privacy-friendly Safari as a default browser, so finding an alternative isn't as important as it is for Windows users. However, Safari offers very little customization and has a limited pool of extensions, so it isn't the best choice for users who like to personalize their browsers.

So if you care about privacy but still want to take advantage of certain extensions and customize your browser, Firefox is an excellent choice. Of course, there are other Chromium-based browsers that take privacy seriously, but none of the major ones are open-source.

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Firefox 88.0 / 89.0 Beta 2 / 89.0b2 Developer / 90.0 Nightly

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file size:

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filename:

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main category:

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