When you open a very large, high-resolution image directly in Mozilla Firefox (for example, by right-clicking a picture and selecting “Open image in new tab”), the browser will automatically shrink the image down so that it fits entirely within the boundaries of your browser window. While this is helpful for viewing the entire picture at a glance, it can be incredibly frustrating for web developers, graphic designers, or photographers who need to immediately inspect an image at its true 100% native resolution without having to click to zoom in every single time. You can disable this automatic resizing behavior.
How to Stop Automatic Image Resizing
This niche setting is not available in the standard menus; you must modify it through the advanced configuration page.
- Open the Mozilla Firefox browser.
- Click on the main URL address bar at the top of the window.
- Type about:config and press Enter.
- Click the Accept the Risk and Continue button when the warning page appears.
- At the top of the page, in the “Search preference name” box, type the following exactly: browser.enable_automatic_image_resizing
- The preference will appear below the search bar. You will see its value is currently set to true.
- Click the Toggle button (the icon with two opposite-facing arrows) on the far right.
- The value will instantly change to false.
From this point forward, whenever you open a standalone image in a new tab, Firefox will always render it at its actual, full-size pixel dimensions immediately. If the image is larger than your screen, you will simply use the scrollbars to navigate around it.