A Web Page Is Slowing Down Your Browser [Fixed]

A web page is slowing down your browser” is not a very rare error message encountered by Mozilla Firefox users. It comes with two options to choose from viz. Wait or Stop. This normally occurs when you update Firefox to newer versions.

Though the problem is pretty common and can occur due to various reasons, there are numerous ways to get rid of it.

Why Does “A Web Page is Slowing Down Your Browser” Error Message Displays On Mozilla Firefox?

To solve this situation, it is recommended to get a clear idea regarding the cause behind such an error message. Take a look into some of the causes behind it and check if the issue is related to it or not.

  • Adobe Flash Protection Mode enabled
  • Browsing data
  • Outdated graphics card driver
  • Cookies and Site Data
  • Inappropriate Firefox Settings

What to Do if “A Web Page is Slowing Down Your Browser” Shows Up on Firefox of Your Windows 10?

Before trying other solutions, restart both your system and Firefox to check whether the problem resolves or not. If the problem persists even after doing so, it is recommended to try other solutions that are mentioned below and see which one works for you. 

Solution 1: Disable Adobe Flash Protected Mode

Disable Adobe Flash Protected Mode

This method is mostly recommended for the 32-bit system rather than a 64-bit Windows system. However, we have mentioned the solution for both.

There are changes that Adobe Flash Protected Mode is enabled and thus it is causing the problem and showing the error message on your screen. Thus, follow the steps provided below to perform this solution.

For 32-bit System Users

  • First of all, double-click on the Mozilla Firefox icon to open it or search for it on the Start search bar. 
  • Go to the menu and click on Add ons. On your right, look for plugins and click on it so that you can see the entire plugin list on Firefox. 
  • Click on Options located near Shockwave Flash Entry and unmark the “Enable Adobe Flash Protected Mode” entry. 
  • Restart your system and check whether the problems get resolved or not. 

For 64-bit System Users

Alternatively, if you are a Windows 64-bit OS user, you can try the method provided below.

  • Launch the File Explorer and go to My Computer. From there navigate to the location C:\Windows\SysWOW64\Macromed\Flash.
  • If you do not find any such folder, most probably the files are hidden and hence it needs to unhide.
  • Go to the View tab on the menu of File Explorer and then select “Hidden items”. Checkmark the Show/hide box.
  • On doing so the File explorer will make all the hidden files visible. In case, you want to do it again, you can do so by marking the box. 
  • Look for a file called “mms.cfg” and right-click on it. Select Edit. Make sure that you are logged in with administrator privileges in order to do that. If the files are non-existent, right-click on the Flash folder and click on New. After that, click on a text file.
  • Now, save the file as “mms.cfg” and set the Save type as All types.
  • Within the mms.cfg file, write this “ProtectedMode=0 down” and save the changes. Once done, quit the Notepad. Close the Firefox browser and wait for some time.

Solution 2: Update your Graphics Card Driver

Update your Graphics Card Driver

As mentioned earlier, any outdated graphics card driver can result in such a problem as well. Thus, try updating the graphics card driver and check if the problem resolves or not. You can do so by following the steps provided below.

  • Go to Start and type “device manager” within the search bar. Select Device Manager from the search list.
  • Alternately, press both the Windows and R keys together to invoke the Run window and type devmgmt.msc. After that, click on Ok.
  • Open the “Display Adapter” category and then right-click on the Graphics Card. Click on Update Driver.
  • Click on “Search automatically for updated driver software” and follow the instructions appearing on your screen. This will successfully install the graphics card driver. Besides, you can also reach the official website of the manufacturer and download the same.

Solution 3: Eliminate Any Firefox Browsing Data

Eliminate Any Firefox Browsing Data

Firefox browsing data can be one of the many factors why you are confronting such issues. Thus, it is recommended to remove the browsing data by following the steps provided below.

  • Go to the Library option on your Firefox browser and then click on History. After that, click on Clear Recent History.
  • Again, go to “Time Range” and click on Everything. Select the arrows beside Details to know the data that will get cleared when you choose the Clear History option.
  • Select the categories which you want to delete and then click on Clear Now.

Solution 4: Disable the Two Settings in about::config if Enabled

Disable the Two Settings in about::config if Enabled

On the other hand, you can also disable the two settings in about::config and check if the problem resolves or not. These are the steps by which you should be able to disable the two settings in about::config.

  • Open Mozilla Firefox by either navigating to the Desktop and double-clicking on its icon or you can just reach the Start menu and search for the Mozilla Firefox on the search box.
  • Go to the address bar of the browser and type “about:config” within it. Once done, press the Enter button. 
  • Type processHang within the search bar and check if you can see “dom.ipc.processHangMonitor” and “dom.ipc.reportProcessHangs” on it or not. Double-click on them and change it to false if it is true. 
  • Save the changes made and restart the system. Check whether the problem resolves or not.

Solution 5: Youtube Related Issue

Youtube Related Issue

There is a probability of facing this on Youtube solely as it can cause bugs and defects within the system. Return to the older version of Youtube and check if the problems resolve for you or not.

  • Open the Mozilla Firefox by either clicking twice on the icon or just by searching for it in the search bar of Start.
  • Type the official website URL of youtube within the address bar of the Mozilla firefox. Go to your profile and click on the arrow placed beside it.
  • Look for “Restore Old Youtube” Option and answer the questions appearing on your screen. Answer the reasons for why you are moving to the older version. Check if the problem gets resolved after implementing this fix.

So these were some of the methods following which you should be able to resolve ‘a web page is slowing down your browser’ error message on Windows 10.

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