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How to go back to firefox 14.01

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My browser work with all my add-ons and plugins at 14.01. When I upgraded to 17.01 nothing has worked for me! Adobe Flash crashes every time I try a video or website that has a flash embedded site it won't display at all.

My browser work with all my add-ons and plugins at 14.01. When I upgraded to 17.01 nothing has worked for me! Adobe Flash crashes every time I try a video or website that has a flash embedded site it won't display at all.

Modified by cor-el

Additional System Details

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0

More Information

iamjayakumars 475 solutions 5852 answers

Certain Firefox problems can be solved by performing a Clean reinstall. This means you remove Firefox and any leftover program files and then reinstall Firefox. Please follow these steps one by one:

  1. Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
  2. After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu) and confirm all upcoming messages.
  3. Now, uninstall Firefox by following the steps mentioned in the Uninstall Firefox article.

IMPORTANT: On Windows, the uninstaller has the option to remove your personal data and settings. Make sure that you do not check this option; otherwise all of your bookmarks, passwords, extensions, user customizations and other Firefox user profile data will be removed from your computer.

After uninstalling Firefox on Windows, delete the "Mozilla Firefox" program folder, located by default in one of these locations:

  • (On 32-bit Windows) C:\Program Files\Mozilla Firefox
  • (On 64-bit Windows) C:\Program Files (x86)\Mozilla Firefox
  1. Go to the Windows Start menu and click on "Computer".
  2. In the Explorer window that opens, double click Local Disk (C:) to open the C:\ drive.
  3. Find the "Program Files (x86)" folder or "Program Files" folder.
    • On 32-bit Windows, double-click the Program Files folder to open it.
    • On 64-bit Windows, you will see a "Program Files (x86)" folder AND a "Program Files" folder. Open the Program Files (x86) folder.
  4. Look for a Mozilla Firefox folder. If you find one, right-click it and select Delete and confirm that you want to move the folder to the Recycle Bin.

Now, go ahead and reinstall Firefox:

  1. Double-click the downloaded installation file and go through the steps of the installation wizard.
  2. Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.

Download All version of Firefox available here

Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove Firefox and any leftover program files and then reinstall Firefox. Please follow these steps one by one: #Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer. #After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu) and confirm all upcoming messages. #Now, uninstall Firefox by following the steps mentioned in the [[Uninstall Firefox from your computer#w_uninstall-firefox|Uninstall Firefox]] article. '''IMPORTANT:''' On Windows, the uninstaller has the option to remove your personal data and settings. Make sure that you do '''not''' check this option; otherwise all of your bookmarks, passwords, extensions, user customizations and other Firefox [[Profiles|user profile data]] will be removed from your computer. After uninstalling Firefox on Windows, delete the "Mozilla Firefox" program folder, located by default in one of these locations: * '''(On 32-bit Windows)''' ''C:\Program Files\Mozilla Firefox'' * '''(On 64-bit Windows)''' ''C:\Program Files (x86)\Mozilla Firefox'' #Go to the Windows Start menu and click on "Computer". #In the Explorer window that opens, double click Local Disk (C:) to open the C:\ drive. #Find the "Program Files (x86)" folder or "Program Files" folder. #* On 32-bit Windows, double-click the '''Program Files''' folder to open it. #* On 64-bit Windows, you will see a "Program Files (x86)" folder AND a "Program Files" folder. Open the '''Program Files (x86)''' folder. #Look for a '''Mozilla Firefox''' folder. If you find one, right-click it and select ''Delete'' and confirm that you want to move the folder to the Recycle Bin. Now, go ahead and reinstall Firefox: #Double-click the downloaded installation file and go through the steps of the installation wizard. #Once the wizard is finished, choose to directly open Firefox after clicking the Finish button. ''' Download All version of Firefox available here * http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/ '''

Question owner

This sounds quite logical. I am going to do it and let you know whether or not that solved the problem. Thank You!

Evarog

This sounds quite logical. I am going to do it and let you know whether or not that solved the problem. Thank You! Evarog
Tyler Downer
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1246 solutions 8218 answers

Please note that you don't want to install an older version of Firefox because they are vulnerable to known security holes that have been fixed in later versions.

Also, update your plugins: https://www.mozilla.org/en-US/plugincheck/

Please note that you don't want to install an older version of Firefox because they are vulnerable to known security holes that have been fixed in later versions. Also, update your plugins: https://www.mozilla.org/en-US/plugincheck/