How to Disable Lazy Loading for Images & Iframes in Firefox Browser

Lazy loading is a technique used to improve page loading times by deferring the loading of images and iframes that are not immediately visible to the user. While this can be beneficial for overall performance, there are situations where you might want to disable lazy loading, such as for testing purposes or to ensure that all content loads immediately. In this guide, we will show you how to disable lazy loading for images and iframes in the Firefox browser using the about:config settings.

Why Disable Lazy Loading?

Immediate Content Availability: Ensures that all images and iframes are loaded immediately, which can be important for certain types of content or user experiences.
Testing and Development: Useful for web developers who need to test the full load performance of a webpage.
Compatibility Issues: Some users may experience issues with lazy loading on specific websites, and disabling it can help mitigate these problems.

Steps to Disable Lazy Loading for Images and Iframes in Firefox

Follow these steps to disable lazy loading for images and iframes in the Firefox browser:

Step 01: Open Firefox

Launch the Mozilla Firefox browser on your computer.

Step 02: Access the Configuration Settings

Open a new tab in Firefox.
Type about:config in the address bar and press Enter.

Step 03: Accept the Warning

You will see a warning message. Click on I accept the risk to proceed.

Step 04: Search for Lazy Loading Settings

In the search box at the top of the about:config page, type or copy-paste the following line: dom.image-lazy-loading.enabled.

Step 05: Disable Lazy Loading

Locate the dom.image-lazy-loading.enabled preference in the search results.
Double-click on the dom.image-lazy-loading.enabled value name to toggle its value from true to false.

Conclusion

By following these steps, you have successfully disabled lazy loading for images and iframes in the Firefox browser. This change ensures that all images and iframes on a webpage will load immediately, regardless of whether they are visible to the user or not.

Additional Information

Re-enabling Lazy Loading: If you decide to re-enable lazy loading in the future, simply repeat the steps above and toggle the dom.image-lazy-loading.enabled value back to true.
Other Performance Settings: Firefox has various performance-related settings available in about:config. Explore these settings to further customize your browsing experience.