How to fix slow Mozilla Firefox on Windows 10?

How to fix slow Mozilla Firefox on Windows 10?

Solution 1 – Change your power settings to high performance

Many users report that Firefox is slowing down on your PC, and this problem is often due to your power settings. According to users, fix slow Mozilla Firefox on Windows 10 sometimes turns your Power Plan into Power Savings after your upgrade; therefore it is recommended that you change your settings in high performance.

To do this, follow these steps:

  • Press Windows key + S and enter Power Options. Select the power option from the menu
  • We have to mention that going into high-performance mode will cause your battery to run faster due to power consumption, but Firefox should work without any recession.

Solution 2 – Switch to a different theme

This is a potential solution, but some users report that it works, so you can try it, according to users, resolves a different, less demanding theme fix with slow Firefox on Windows 10. Users have reported that all recession problems were fixed for them using a theme like high contrast theme.

By reducing the default demand, Firefox can seem surprisingly attractive by changing the default theme, but it should work faster than before. To change your Firefox theme, do the following:

  • Open Firefox and click the menu button in the top right corner and choose Add-on.
  • Select Get Add-ons tab on the right and click Featured themes.
  • Try to find a simple theme that won’t use too much of your resources and install it.

How to Fix Firefox Error sec_error_unknown_issuer?

How to Fix Firefox Error sec_error_unknown_issuer?:

Mozilla Fix Firefox error Premium online tech Support Company focuses on Firefox Error sec_error_unknown_issuer to avoid trouble due to our Mozilla Firefox. Sometimes users are using Mozilla Firefox to browse a website; you go to the website using an SSL certificate and receive an error that your connection is not secure. If you click to learn more, you will see the following message below.

  1. Repair registry entries associated with error sec_error_unknown_issuer

  • Click on Start button
  • Type “command” in the search box … do not hit it yet!
  • With the CTRL-Shift on your keyboard, press ENTER
  • You will be prompted with the permission dialog box.
  • Click Yes
  • A black box will open with the blinking cursor.
  • Type “Regedit” and press enter
  • In Registry Editor, select the error sec_error_unknown_issuer-related key (such as Firefox) that you want to back up
  • From the File menu, select Export
  • Follow Save to List, select the folder where you want to save the Firefox backup key.
  • In the file name box, type a name for your backup file, such as “Firefox backup”.
  • Export the range, make sure that “selected branch” is selected.
  • Click Save
  • The file is then saved with a .reg file extension.
  • You now have a backup of the registry entry related to Firefox
  1. Operate a complete malware scan of your PC:

  2. Clear your system junk (temporary files and folders) with Disk Cleanup (


Fix Firefox error sec_error_unknown_issuer (solution)

How to run Disk Cleanup (Windows XP, Vista, 7, 8, and 10):

  • Click on Start button
  • Type “command” in the search box … do not hit it yet!
  • With the CTRL-Shift on your keyboard, press ENTER
  • You will be prompted with the permission dialog box.
  • Click Yes
  • A black box will open with the blinking cursor.
  • Type “cleanmgr” and press Enter
  • Disk Cleanup You can start calculating how much captured disk space.
  • Disk Cleanup dialog box will appear with a series of checkboxes you can select. In most cases, the “temporary files” category will occupy the most disk space.
  • Check the boxes of categories that you want to clear and click OK.
  1. Update your PC device driver:

  2. Use Windows System Restore for “Undo” System Recently Recently

To use System Restore (Windows XP, Vista, 7, 8, and 10):

  • Click on Start button
  • In the search box, type “System Restore” and press ENTER.
  • In the results, click System Restore.
  • Enter an administrator password (if prompted)
  • Follow the wizard steps to select the restore point
  • Restore your computer
  1. Uninstall and restore the Firefox program, connected to error sec_error_unknown_issuer

Uninstall and restore instructions for Windows 8, 10:

  • To add the start menu image, place the cursor at the bottom of the screen
  • Right-click to fetch the initial context menu
  • Click Programs and Features
  • Find out that the certificate is not trusted because the issuer certificate is an Anonymous-associated program under the Name column.
  • Click on the Firefox-related entry
  • Click Uninstall / Change on the top menu ribbon.
  • Follow the on-screen instructions to uninstall your error sec_error_unknown_issuer-related program
  •  Uninstall your error sec_error_unknown_issuer-related program (such as Firefox), restore the program according to the Mozilla Foundation instructions.
  1. Run Windows System File Checker (“SFC / scannow”)

System file tester is an easy tool that is included with Windows that allows you to scan and restore windows system files for corruption (including error-related sec_error_unknown_issuer)

  • To run the system file checker (Windows XP, Vista, 7, 8, and 10):
  • Click on Start button
  • Type “command” in the search box … do not hit it yet!
  • With the CTRL-Shift on your keyboard, press ENTER
  • You will be prompted with the permission dialog box.
  • Click Yes
  • A black box will open with the blinking cursor.
  • Type “Sfc / scannow” and press enter
  • System file tester error will begin scanning for sec_error_unknown_issuer and other system file problems (Endurance – System scan may take for a while).
  • Follow the on-screen commands
  1. Install All Available Windows Updates:

Microsoft is constantly updating and improving Windows system files that may be related to error sec_error_unknown_issuer

To check for Windows updates (Windows XP, Vista, 7, 8 and 10):

  • Click on Start button
  • Type “update” in the search box and press enter.
  • The Windows Update dialog box will appear.
  • If updates are available, click the update button.
  1. Perform a Clean Installation of Windows:

Reasons of Error sec_error_unknown_issuer:

  • Corrupt download or incomplete installation of Firefox.
  • Corruption in Windows registry from a recent Firefox-related software change
  • Virus or malware infection that has corrupted Windows system files
  •  Program have maliciously or mistakenly deleted Firefox-related files.

How to Make Firefox your default browser?

How to Make Firefox your default browser:

If you have more than one web browser installed, any links that you click on will automatically open in your default browser. This article shows you how to make Firefox your default browser.

  1. Click the menu button Fx57Menu and select Options.
  2. In the General panel, click Make Default….

3. Close the about:preferences page. Any changes you’ve made will                     automatically be saved.

Setting Firefox as the default browser does not work – What to do

Symptoms of this problem can include:

  • Firefox reports that it is not the default browser when you check using the Firefox options window.
  • Firefox prompts you to set Firefox as the default browser each time it starts.
  • Firefox does not open after clicking on links in other programs.

Using your operating system

Windows 7 and Vista

  1. Click on the Windows logo to open the Start menu, then select Control Panel. The Control Panel window will open.
  2. Click on the link labeled Programs. The Programs panel will open.

3. Click on the link labeled Set your default programs. The Set your               default programs panel will open.

4. In the Programs list on the left side of the window, click Firefox.

5. In the right side of the window, click Set this program as default.

How to fix Mozilla Firefox updated every time error?

Firefox says it’s just updated every time it starts – how to fix.

Mozilla Firefox is a web browser and this browser use widely. When users update and download the latest version of Firefox then users face Sometimes users face problem in Mozilla Firefox updated every time error every time it starts and users update Firefox much time. Ther are two way to solve this error.So if you face this problem then

Follow these steps:

There are two possible causes for this. You may have that tab saved accidentally as your homepage or Firefox may be having trouble saving to your settings file which results in it not realizing you have already seen the “You’ve been updated” message.

  1. “Firefox Updated” tab saved to your home page

  • Click the menu button and choose Options.
  • Select the General panel.
  • In the Startup area, highlight the text on the Home Page: box.
  • If it includes something similar to then you have accidentally added the “Firefox Updated” page to the sites that Firefox loads on startup.
  • You can fix this by clicking Restore to Default. To change your homepage to something
  1. Firefox is unable to save your preferences:

Firefox changes a setting in its preferences file to determine whether you’ve seen the “Firefox Updated” tab. If you are having problems with that file then Firefox will be unable to save this information and will show you the “Firefox Updated” tab each time you start it. You may also notice that options you select in your Options tab are not kept after you close Firefox.