How to solve error message: Firefox to slow down when using an extension (3 Amazing Easy Solutions)?


When you install the Turn Off the Lights Firefox extension for the first time, you may see this yellow bar with the following text “a script in this extension is causing Firefox to slow down”.

What is Firefox?

Mozilla Firefox is a free and open-source web browser developed by the Mozilla Corporation, a subsidiary of the Mozilla Foundation. It was first released in September 2002 as Phoenix, and later, due to trademark issues, it was renamed Mozilla Firebird and finally Mozilla Firefox in 2004.

The Mozilla Foundation is a non-profit organization that promotes an open and accessible internet. Firefox is known for its speed, privacy features, and customization options. It is available for various operating systems, including Windows, macOS, Linux, and Android. The browser has a large community of users and developers who contribute to its ongoing development and improvement.

Benefits of using Firefox

Mozilla Firefox offers several benefits to users, making it a popular choice for web browsing. Here are some of the key advantages:

  1. Open Source:
    • Firefox is open-source, meaning its source code is freely available for anyone to inspect, modify, and distribute. This fosters transparency and community-driven development.
  2. Privacy and Security:
    • Firefox places a strong emphasis on user privacy and security. It includes features such as Enhanced Tracking Protection to block tracking cookies and protect user data from advertisers and other third-party entities.
  3. Customization:
    • Firefox is highly customizable, allowing users to personalize their browsing experience. Users can add extensions, themes, and customize various settings to suit their preferences.
  4. Performance:
    • Firefox is known for its fast performance and efficient memory usage. Over the years, Mozilla has continually worked on improving the browser’s speed and responsiveness.
  5. Cross-Platform Availability:
    • Firefox is available for various operating systems, including Windows, macOS, Linux, and Android. This allows users to have a consistent browsing experience across different devices.
  6. Syncing Across Devices:
    • Firefox Sync enables users to synchronize their bookmarks, passwords, history, and other settings across multiple devices, making it convenient for users who switch between different platforms.
  7. Community Support:
    • Being an open-source project, Firefox has a vibrant community of developers and users who contribute to its development, report bugs, and provide support. This community-driven approach helps ensure a robust and continuously evolving browser.
  8. Developer Tools:
    • Firefox provides a set of powerful developer tools that are useful for web developers and designers. These tools aid in debugging, profiling, and testing web applications.
  9. Respects Standards:
    • Firefox adheres to web standards, promoting a consistent and interoperable web. This means websites and web applications designed to standards are more likely to work seamlessly in Firefox.
  10. Regular Updates:
    • Mozilla releases regular updates for Firefox, including security patches, bug fixes, and new features. This helps in keeping the browser up-to-date with the latest technologies and security measures.

While these are some general advantages, the choice of a web browser often depends on individual preferences and needs. Users may choose Firefox based on its features, philosophy, or specific capabilities that align with their priorities.

Here are the solution(s) on how to fix this issue in your Mozilla Firefox web browser:

Solution 1 – Firefox to slow down

You are experience that Firefox to slow down. Try to disable them one by one except Turn Off the Lights, that will fix this issue. Because some Firefox extensions block the loading of the Options page.

  1. Open the Firefox web browser
  2. Type this page in your address bar:
  3. And disable all the Firefox extensions one by one except “Turn Off the Lights”
Firefox to slow down that can be solved with disable the other Firefox add-ons in your Firefox web browser
Firefox to slowdown that can be solved by disabling the other Firefox add-ons in your Firefox web browser

Solution 2

If you can open the Turn Off the Lights Options page, you receive this yellow bar when enabling the “AutoStop” feature. Try to disable this option, because there is a bug in Mozilla Firefox performance of the Observer API. That caused the Firefox to slow down.

The observer API does not work well on the Firefox web browser. However, there is no issue if you use the Google Chrome, Opera, Safari, and Microsoft Edge web browsers.

Solution 3

If you still experience this error message “A script in this extension is causing Firefox to slow down”. You will learn everything about the Firefox to slow down. Check you are using the Firefox version 65 or higher. Because this will show not this yellow bar anymore from Firefox.

FAQ about Firefox to slow down

Why is Firefox to slow down?

Firefox to slowing because to achieve a balance between speed and features, optimizing the user experience.

How can users contribute to Firefox improvements?

Users can provide valuable feedback, participate in beta testing, and engage in community discussions on Firefox platforms.

Will the Firefox to slow down affect all users equally?

Firefox aims to maintain specificity in performance, ensuring that improvements cater to diverse user needs.

Are there alternatives for users who prefer faster browsers?

Firefox acknowledges user preferences and encourages exploration of alternative browsers based on individual needs.

What should users expect in future Firefox updates?

Future updates will include a mix of under-the-hood optimizations and user interface tweaks, all aimed at enhancing the overall browsing experience.

What can users expect from future updates mentioned in the text?

Under-the-hood optimizations and user interface tweaks are planned to enhance the overall browsing experience.

Is there a specific focus in the upcoming updates?

Yes, the focus is on improving the browsing experience through a combination of under-the-hood optimizations and user interface tweaks. And not to Firefox to slow down the web browser.

Did you find technical, factual or grammatical errors on the Turn Off the Lights website?
You can report a technical problem using the Turn Off the Lights online technical error feedback form.

About The Author

Stefan Van Damme