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Mozilla Firefox Extensions and blockers: troubleshooting guide

Find practical guidance for mozilla firefox extensions and blockers problems on supported devices. Start with low-risk checks and preserve your personal data before making changes.

Menu names can vary by operating system and browser release.

Before you begin

Make a note of your device, browser version, exact symptoms, and any displayed error. If your browser contains important unsynced passwords, bookmarks, or open work, back them up before resetting settings or clearing data.

Step-by-step checks

  1. Open the browser’s extensions or add-ons management screen.
  2. Disable the most recently installed extension and retest.
  3. Check whether the extension is compatible with the browser and current version.
  4. Review site-specific content-blocking settings rather than disabling protections everywhere.
  5. Remove unfamiliar extensions and review changes to the default search engine.

If the problem continues

Test whether the issue happens in a second browser, a private window, or a separate trusted network. This helps distinguish a browser problem from a website, device, or internet problem. Avoid disabling certificate warnings, antivirus protection, or company policies just to make a page load.

Video: browser troubleshooting basics

Illustrated general walkthrough. Exact menus depend on your browser and version.

Related search topics and FAQs

These are related user searches covered by this guide. Some require device-specific checks; the phrases below are not separate identical articles.

Need assistance? Request a callback with your browser name and the error you see. Do not send passwords or financial details.

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