Many Mac users have observed the performance issue. Sometimes Firefox just doesn’t work well with certain versions of macOS, for example the previous macOS Big Sur. Step 6: Switch to an alternative web browser. When you are using Firefox, close as many other apps as possible to squeeze more system resources (CPU, RAM) for Firefox. which I view as heavy sites because they usually contain video ads. Step 1: If Firefox becomes totally unresponsive, force quit.Īlways try to open one Firefox window, and close tabs/pages you don’t need to read, especially when you finish reading content from big magazine websites like Forbes, Huffington Post, Macworld, etc. How to Fix a Slow or Freezing Firefox on Macįollow the step-by-step fixing guide below, you should be able to resolve most Firefox performance issues on Mac.

Your Mac is slow in general, making you feel Firefox is the culprit.

Your Firefox has lots of caches, browsing histories, downloads, and extensions.

You are using a very old version of Firefox.

Too many resource-intensive applications are running, leaving Firefox little space to process its requests.

You have opened many tabs and windows while browsing, especially those heavy pages.

Those elements are very likely to cause Firefox to freeze.

You are browsing sites that contain heavy content such as video ads, images, Javascripts, etc.

will let you view information about or remove the webmail services that Firefox can use.To date, the latest version of Firefox on Mac is 72.0 Firefox Slow on Mac: Possible Causesĭepending on the macOS version your Mac is running, and the Firefox version you use, the reasons may vary. will let you specify an external program for Firefox to launch.

Yahoo! Mail, Gmail, Hotmail) message composition page inside Firefox.

Use will open your webmail service's (e.g.

Thunderbird, Outlook, Entourage, Evolution) to its message composition window.

Use (default) will automatically launch your operating system's email program (e.g.

Always ask will prompt you each time you use a mail function for which program or service to use.

Search for the Content-type: mailto and select it.Ĭlick on the Actions column in the mailto row, to change the action. If you don't see the Applications panel, click on the small oval in the upper right corner to reveal it. On the menu bar, click on the Firefox menu, and select Preferences. For older versions, see Mac OS X - Setting the Default Mail Program.

This document provides directions for Firefox versions 3.0.x and higher for Mac OS X.

This document details the process for changing the program that Firefox will open when a mailto is link selected.

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