How to Fix ‘Firefox Add-Ons Not Working on PC’ Issue

How to Fix ‘Firefox Add-Ons Not Working on PC’ Issue

This guide is about How to Fix ‘Firefox Add-Ons Not Working on PC’ Issue. So read this free guide, How to Fix ‘Firefox Add-Ons Not Working on PC’ Issue. If you have query related to same article you may contact us.

How to Fix ‘Firefox Add-Ons Not Working on PC’ Issue – Guide

Add-ons let you customize Firefox with extras features. You can download add-ons to compare prices, check the weather, customize the look of Firefox, listen to music, and even update your Facebook page.

An extension’s failure to install may be due to issues with the extension, Firefox settings, or Firefox version you are using. This page discusses the various reasons for installation issues, as well as what you can do to resolve them.

how to fix it

Add-on is not supported

If your installed version of Firefox does not fall into this range, installing the add-on will result in an error indicating that the add-on is not supported. If your version of Firefox is incompatible with the add-on, you can:

  • Update to the latest version of Firefox. For more information, see Update Firefox to the Latest Version.
  • Find an add-on version compatible with your version of Firefox. Firefox add-ons site usually has more up up to the current version of each add-on.
  • Use a different extension. For many extensions, there are similar extensions that provide the same functionality. For more information, see Firefox Add-ons.
  • Contact the add-on author on the support site listed on their add-on page.
  • Firefox prevented this site from installing an unverified add-on

    Firefox protects you from malware and browser hijackers by blocking third-party add-ons that are not digitally signed and verified by Mozilla.

    The add-on has a high risk of causing stability or security issues and cannot be installed

    Certain add-ons have been blocked by Mozilla because they are unsafe.

    Firefox prevented the site from prompting you to install software

    By default, Firefox allows you to install add-ons only from trusted websites. If the site from which you are installing the add-on is not in the list of trusted sites, a yellow bar will appear at the top of the webpage with a message similar to this one:

    To allow the site, click Allow in the yellow bar.

    To add the site to the trusted sites list:

  • click on the menu button Fx89Buttonmenu and select.
  • Select the panel and scroll down to the Permissions section.
  • To the right of Prompt when sites try to install add-ons, click Exceptions….
  • In the Allowed Sites – Add-ons Installation dialog box, the list of allowed sites is displayed. The current website URL is entered into the text field.
  • To allow the site, click Allow. Then click Save Changes.
  • Close the page about: ​​preferences. All changes made will be automatically saved.
  • You are prompted to download the add-on instead of installing it

    Some sites serve as add-on downloads, requiring you to download the file to your computer before installing it.

  • These files are usually .xpi or .jar files.
    1. Download the file to your local computer.
    2. click on the menu button Fx89Buttonmenu, click and select.
    3. To add the downloaded add-on to the list of available add-ons, drag and drop the file into the Add-ons window. The add-on is added to the list.
    4. The installation process should begin.

    Corrupted extension files

    1. Open your profile folder:

  • click on the menu button Fx57menu, click and select. The Troubleshooting Information tab will open.
  • In the Application Basics section next to Profile Folder, click Open Folder. Your profile folder will open.
  • 2. Click on the Firefox menu Fx57Menu and select.

    3. Delete the following files:

  • extensions.sqlite
  • extensions.sqlite-journal (if found)
  • extensions.ini
  • extensions.json
  • 4. Restart Firefox.

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