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Firefox mac freezes on startup

Use the Table of Contents below for better navigation. There could be so many causes, but in general, they all fall into the following four categories. Personal Habits. If you keep your Mac running all the time, let too many apps join the fun on startup, or multitask with loads of heavy applications open — more often than not, your Mac will hang. A newer macOS usually performs better than an old one, but no system is perfect. You may experience firmware or permission issues that impede performance as well.

Software Issues. Apps, whether pre-installed or third-party ones downloaded elsewhere, can consume lots of system resources when used improperly, which eventually will slow down a Mac. Outdated Hardware. Every piece of hardware has a lifespan; your Macbook is no exception. An outdated hard drive or lack of RAM can be the bottleneck of your machine.

These are just the high-level reasons. Check out this infographic that outlines 26 specific reasons why a Mac might run slowly.

For example, Photos can take a while to update the entire picture library; Spotlight re-indexing tends to be time-consuming as well. We break down the solutions into two categories:. Note though, the solutions we suggest below only work when your Mac can boot up normally. If it cannot, or you hear strange sounds coming from the machine particularly from the internal Mac hard drive , contact Apple support or schedule an appointment with a Genius Bar in your area.

MacBook Pro Slow?

The methods introduced below are the best manual fixes we have explored. The order is based on a combination of estimated time required and expected effectiveness after implementation. Meanwhile, read this checklist on how to speed up Macbook Pro. When to use: your Macbook Pro runs extremely slow on startup. Why it helps: because macOS treats each desktop item be it a file, a Dock application, or a Dashboard widget as a small task, it uses resources to load it when starting up. Reducing the number of such items can make the first screen show up quicker. When to use: your Macbook Pro is running out of space, and it slows down or freezes more frequently.

If your MacBook Pro is running out of storage, that means little virtual memory can be used by the system if needed. This may cause your Mac to freeze more frequently — even when you just launch a few apps. Note: if you want to save time, CleanMyMac is a nice tool for this purpose.

It automatically detects and cleans extra junks that can take up gigabytes of disk space. When to use: your Macbook has issues launching some applications, and doing so slows down your Mac. Why it helps: corrupted or damaged file permissions can cause certain applications to run abnormally or unable to run at all, thus affecting the overall Mac performance. How to do: check out this Apple support article or this YouTube video for a step by step guide. When to use: your web browser Safari, Chrome, or Firefox, etc. Why it helps: web browsers are notorious for dragging down computer performance after extended use.

By implementing the things below, you can expect a much smoother net surfing experience. When to use: your Macbook starts to run slower after opening several applications, but you have no idea which application is the culprit. Why it helps: Activity Monitor is a task manager on Mac that shows you both running applications and inactive processes. Slow Firefox browsing experience is truthfully beyond annoying.

It seems like it's almost working, but you can't get anything done. See how many tabs you have opened. More than a few?

Active tabs mean active processes that take up your laptop's RAM and drastically slow down its capabilities. Just close the tabs you're not actively using.

How to Fix a Slow or Freezing Firefox on Mac

All the websites you visit leave behind cached image files, which are supposed to speed up load times, and cookies, which can save you from having to log in over and over. Those are big conveniences if they work the way they're supposed to, but sometimes cache and cookies can cause glitches and slowdowns.

Alternatively, you can do this easier and safer with CleanMyMac. Just click Privacy in the sidebar and then choose Firefox from the list. Change the time range to Everything, and you can clear all of the cookies, browsing history, downloads history, tabs, saved passwords, and even autofill values. If closing tabs and clearing the cache didn't work, it's a good idea to update Firefox and macOS to its latest versions.

When Firefox is active, just click on Firefox in the menu and select About Firefox. The latest available update should start downloading automatically. When it's ready, click Restart to Update Firefox and you are ready to go. Updating macOS is easy too. Just launch the App Store on your Mac. Go to the Updates tab and wait till it shows you all the new software versions available. If you see new updates for macOS, click Update and follow the restart instructions. If the problem persists, check for high hardware resource usage.

For basic information, you can use Mac's native Activity Monitor. However, to see the whole picture, get a pro-level app, such as iStat Menus. If you see Firefox using too much memory or CPU, you need to take some action. When Firefox stops responding to your clicks it's very likely that one of your installed plugins is the culprit. To check for that, click the Menu button, and then choose Add-ons.

In the Add-ons Manager's Plugins panel, you can select Never Activate for each plugin, then restart Firefox and see if the problem is still happening. If the problem is gone, turn the plugins back on one by one, just changing that Never Activate option back to Always Activate. Restart Firefox each time and then try to recreate the error.


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Once the problem reappears, you'll know it was likely caused by the last plugin you re-enabled. You can also remove a plugin with CleanMyMac 's Extensions tab, which is actually a lot easier than using Firefox. Mozilla then recommends you change the filename to add an X in front, which will remove the plugin. You can reinstall a fresh copy of the plugin from official sources only!

All of your macOS Catalina issues solved

To check your extensions in Firefox, go to about:add-ons , then click Extensions in the sidebar. You can disable extensions here, and then turn them back on one by one, in the same way you just checked your plugins. If you want to remove all your extensions and start fresh, you can click the Remove button or use the Extensions tab in CleanMyMac, which manages extensions, add-ons, and plugins from one place. Preventing Flash content from loading automatically deserves a separate explanation. Some websites use way too much Flash content, and loading and playing all of that uses up your computer's resources, especially if you keep a lot of tabs open.

Luckily, you can tell Firefox to stop loading Flash content by default, until you ask for it. But if you're still experiencing troubles, there is more you can do. Read on. Whether Firefox shows you an error message every time you try to launch the app or right when you're in the middle of a working session, there is only one way to fix that — reinstall the application.

The easiest way to reinstall Firefox is to quit it, delete the Firefox file from your Applications folder, and download the new version from the official Mozilla website. That will uninstall the application but keep all your user data intact, and when you reinstall a new copy, you bookmarks and passwords will still be there. But that's not the best way to do it, since Firefox leaves all kinds of data on your hard drive besides the main application file. There are rare cases when the "Firefox quit unexpectedly" message could be caused by the Mac security update.


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  4. 5 Simple Solutions When MacBook Pro Keeps Freezing;
  5. This happens when your Mac's firewall used to recognize previous versions of Firefox but no longer trusts the new one. Follow official Mozilla documentation to fix this issue. So your Firefox is fast and doesn't randomly quit, but still doesn't seem to load websites. There are a few things that might cause this, so let's zero in on the problem by gradually excluding various perpetrators.

    Turn your modem off and on helps in nearly all cases. As soon as you launch NetSpot , make sure it's set to Discover mode, and it will scan all nearby WiFi networks automatically.

    WiFi Explorer is just as easy — launch the app and click the play button to analyze the network quality around you. If your WiFi network seems to be fine, it's good to check whether the connection works in other browsers, like Safari or Chrome, just to make sure that the problem in fact is with Firefox specifically.

    Then, check the settings in your firewall by following the steps outlined by Mozilla. If upon loading the website you get the "Proxy server is refusing connections" message, there is an easy fix for that. In case Firefox shows you that it has troubles validating some website's security certificate, it might be related to improperly set date and time on your system.

    Another option you can try is flushing the DNS cache, which acts as a temporary database, storing all sorts of connectivity logs and website access attempts. Combine flushing the DNS cache with clearing out cache and cookies from Firefox, and restarting your Mac to get the best result. If you are still experiencing troubles loading websites, it could be that DNS prefetching is at play.

    Usually Firefox tries to speed up loading new websites by using DNS prefetching, but it can also cause loading errors with some system configurations. To disable DNS prefetching:.

    # (OSX (17C88) - Instant crash on startup) – Tor Bug Tracker & Wiki

    The last step to try to fix the website loading issue is to check your system for malware. If you remember Firefox being haunted by ad pop-ups, toolbars you didn't install yourself, or a new default home page, you might have picked up some malware that's hijacking your browser sessions. It's a free download, with a pro license for more active, real-time protection.