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Why Is Firefox So Slow on Mac – A Quick and Easy Guide to Solve!

By Xyla, Last updated: October 18, 2019

The Mozilla Firefox is known to be one of the best web browsers that are available in any platforms today. That is why many people actually liked using this web browser. On the other hand, as per Mac users, there is actually a tendency that using the Mozilla Firefox tends to slow down their Mac.

That is why in this article, we are going to show you the reason as to why is your Firefox so slow on your Mac. And we are also going to show you several ways on how you can resolve this type of concern.

Part 1: Reason For Firefox Running Slow On MacPart 2: How to Make Your Firefox Run Faster on MacPart 3: Fastest and Easiest Way to Clean Up Your BrowserPart 4: Conclusion

Part 1: Reason For Firefox Running Slow On Mac

The reasons as to why your Mozilla Firefox is slow on your Mac actually depends on the OS X version that you are using. However, here are some of the general reasons for this kind of situation.

  1. You are actually browsing websites that require you to use plugins such as JavaScript and Adobe Reader. And because of this, it can cause your Mozilla Firefox to slow down or even hang.
  2. You are opening too many tabs on your Mozilla Firefox at the same time and most of the tabs that you are opening have Ajax-based websites. These Ajax based websites are the ones who send out data to client PC real-time which makes it the sole reason for most websites who are running in Ajax makes your Mac run slow.
  3. There might be multiple third-party resources running on your Mac. This is one cause as to why it drains your RAM resulting to not have resources for Firefox to make your request.
  4. You have an outdated Mozilla Firefox.
  5. You have not cleared out your cache and as well as your browsing history on your Firefox browser for a long time.
  6. You have not cleaned up your Mac for a while.
Why Is Firefox So Slow

Part 2: How to Make Your Firefox Run Faster on Mac

Now that you have known all the possible reasons as to why your Mozilla Firefox is running slow on your Mac, we are going to show you here some solutions that you can do. Doing all the solutions that we are going to provide you will definitely make a difference in using your Mozilla Firefox browser on your Mac.

Solution #1: Close All Tabs and Windows in Firefox

Once that you have open several tabs on your Mac simultaneously, then this could actually be the reason for your browser to slow down. This is because each tab that you run on your Mac is eating up your system resource. And as these resources become limited, then the result is that the tabs you open will take a slow process. That is why you have to make sure that you close all unnecessary tabs on your Firefox browser.

Solution #2: Update Your Mozilla Firefox

As we have mentioned earlier, having an outdated Firefox is one cause as to why it runs slow on your Mac. That is why updating the program is necessary. This way, you will be able to fix any bugs on using your Firefox.

Solution #3: Clear Your Browser’s History

Your Firefox history has an effect when it comes to its performance. That is why one that you have a bunch of data under your browser’s history, you will then experience your Firefox browser to run slow. That is why it is one solution that you can do is to clean up your browser’s history.

And for you to be able to clear out the history of your browser, all you need to do is to follow the steps below.

Step 1: Launch your Firefox browser on your Mac and then navigate to History.

Step 2: And then choose Clear Recent History.

Step 3: From there, go ahead and choose the Details and choose all the options.

Step 4: Once that you have chosen the range of time that you want to remove from your browser’s history, go ahead and click on the “Clear Now” button.
Why Is Firefox So Slow Firefox

Solution #4: Turn Into Safe Mode

Another way for you to be able to make your Firefox run faster is to make it run in a Safe Mode. This way, you will be able to prevent any Add-ons from starting up. And for you to be able to go to your Safe Mode, here are the steps that you should follow.

Step 1: Go ahead and click on the Firefox menu.

Step 2: After that, go ahead and click “Help”.

Step 3: And lastly, go ahead and click on the “Restart with Add-on disabled”. And then, have your Firefox browser restarted in Safe Mode.

Solution #5: Disable Your Anti-Virus or Add Firefox Exception

The former developer of Firefox once said that the anti-virus actually makes the Mozilla Firefox run slow. This is because an antivirus program can actually make your Mozilla Firefox updates slow down and that affects its overall performance. That is why you have to pause the use of your antivirus when you are going to use your Mozilla Firefox browser on your Mac.

People Also ReadWhy Is My MacBook Pro So Slow and What to Do about It17 Reasons Why Your Mac Running Slow!

Part 3: Fastest and Easiest Way to Clean Up Your Browser

Now, as what we have mentioned earlier, one of the most common reasons as to why your Firefox runs slow on your Mac is because of too many caches, history, cookies, downloads, and more than you have stored in it. That is why the best thing that you can do is to clean all these unnecessary things from your browser.

In doing this, you can actually choose from two methods. One is by going through them one by one – which can actually take you some time. And the other one is by using a third-party application. So, if you are the type of person who does not want to spend more time doing this, then we highly recommend you to use the PowerMyMac Privacy.

The PowerMyMac Privacy is one effective tool that you can actually use for you to be able to clean up all the unnecessary things that you have on your Firefox browser. It can clean up your cookies, searches, downloads, caches and some other visits from all browsers that you have on your Mac.

To know how to use the PowerMyMac Privacy, here is a simple guide that you can follow.

Step 1: Download and Install

First is that you need to download the FoneDog PowerMyMac from our official website. And once that you are done downloading it, then go ahead and simply install it on your Mac.

Free Download

Step 2: Launch the Program

After completing the installation process of the program, go ahead and launch it on your Mac. From the main interface of the program, you will be able to see your Mac’s system status by default. So if you want to see this in the future, all you need to do is to click on the “Status” option located at the top of your screen.
Status

Step 3: Choose Toolkit Option

Once that you are done viewing the status of your Mac, go ahead and simply choose Toolkit located at the top of your screen. Once that you click on that option, you will then be able to see a list of modules under the Toolkit option.
Toolkit

Step 4: Choose the Privacy Module

After that, from the list of modules shown on your screen, go ahead and simply choose “Privacy”.

Step 5: Scan Your Files in Browser

Then go ahead and click on the “Scan” button and then wait until the scanning process of the files that you have in your browser.
Privacy Scanning

Step 6: Choose the Browser to Clean

Once that the scanning process is complete, go ahead and click on the View button for you to enter the page wherein you will be able to find a list of the browsers that you have on your Mac. From there, all you need to do is to click on the Mozilla Firefox browser.
Privacy Chrome

Step 7: Choose the Files on Your Mozilla Firefox Browser

Once that you have selected the browser that you would want to clean up, you will be able to see a list of files under that browser. You will be able to see Visit History, Downloads, History, Cookies, and more. And these files are all located on the right side of your screen.

From there, you can go ahead and select the files that you would want to clean up. Or you can also simply click on the Select All button for you to be able to choose all files listed on your screen.
Privacy Chrome Watch

NOTE: You can also move your mouse cursor to the right and you will be able to see some more details by clicking on the Show button.

Step 8: Clean Up All Selected Files

After choosing all the files that you would want to clean up, go ahead and simply click on the Clean button located at the lower right part of your screen. This will then initiate the cleaning process.

Step 9: Confirm the Action

Then, you will be able to see a pop-up message that will appear on your screen asking you to confirm the action to be done. From that pop-up message that appeared on your screen, go ahead and choose the Confirm button. Then the cleaning process will take place.

Once that the cleaning process is done, then that means that all the files that you have chosen from your Firefox browser had been deleted completely from your Mac. It’s that simple, right?
Privacy Chrome Delete

As you can see, cleaning up your Firefox data that you have is very easy when you use the PowerMyMac Privacy by FoneDog. This also will save you more of your time from going through them one by one. Aside from this feature of the PowerMyMac, it also comes with other cool and really helpful features.

The PowerMyMac can also help you in cleaning up all the things that you no longer need from your Mac such as your System Junks, Email Junks, Large and Old Files, Duplicates, and more. Cleaning your Mac is also another solution that you can do for you to be able to make sure that your Firefox browser will run faster on your Mac device.

This is simply because the PowerMyMac is considered to be an all-in-one Mac application and one of the most powerful apps there is nowadays. That is why every Mac users should have this to ensure that their Mac will always run smoothly and that they will be able to clean up their Mac anytime easily to free up more of their storage space and as well as to make their performance of their Mac better.

Part 4: Conclusion

Since Mozilla Firefox is one of the most popular browsers that we have nowadays that is why many Mac users would actually turn into using them. However, since this is not the default browser intended for Mac, there are instances that they will experience that Mozilla Firefox may run slow on their Mac or even freezes or crashes every time they use it.

Luckily, we have the perfect solutions that you can apply for you to be able to fix this problem. All you need to do is to perform all the above solutions that we have provided. Also, you can try to use the most recommended all-in-one Mac application there is and that is the PowerMyMac.

This tool will also help you in cleaning up the unnecessary data or files that you have on your browser in just a few minutes. This way, you will be able to save up a lot of your time from going through your browser’s files one by one. Aside from that, you can also use the PowerMyMac for you to be able to clean up all the junks that you have. This way, you will be able to help your Mozilla Firefox browser to run faster.

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