Disables blur for images shown at integer zoom levels. Useful for 4K-monitor owners.

SmartUpscale - Enhance Image Quality on Firefox
SmartUpscale is a highly efficient Firefox extension designed to enhance the quality of images by eliminating blur when images are shown at integer zoom levels. Specifically useful for 4K or high-DPI monitor owners, the extension works by ensuring that images with an integer number of physical pixels larger than their natural size do not blur. It works once the page is fully loaded, after dynamic changes on the page, and on changing browser-level zoom. The extension's options also allow the limitation of the maximum image zoom where blur should be prevented and an option to disable blur globally if needed.
Add-on stats
Manifest V2
By: Marat Tanalin
Rating: 4.95
(20)
Weekly download count: 17
Firefox on Android: No
Permissions:
- storage
Size: 19.90K
Full description: See detailed description
Ranking
User reviews
Pros
- Essential for improving the clarity of images on high-resolution displays, particularly 4K monitors.
- Effectively sharpens pixel art and low-resolution images, eliminating blur from scaling.
- Supports fractional screen scale factors properly, ensuring correct image zoom at various DPI settings.
- Significantly enhances the viewing experience for webtoons and similar content at high zoom levels.
- Works well across various websites, fixing blurry graphics and providing clearer images.
Cons
- Lacks the ability to customize settings for specific websites, applying the same upscale effect across all pages.
- Some users desire more control over interpolation settings for different types of content.
Most mentioned
- Improves image sharpness and clarity on high-DPI screens.
- Fixes blurriness from default Firefox scaling methods for low-resolution images.
- Highly praised by users with 4K displays for enhancing their browsing experience.
User reviews
by zanixmechanix, 2025-01-21
by Firefox user 17347874, 2025-01-20
Should be preinstalled when installing firefox, just like transparent-standalone-image, and Ublock Origin
by IQman, 2024-10-08
Add-on safety
Risk impact
SmartUpscale requires a few sensitive permissions. Exercise caution before installing.
Risk impact analysis details
- Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood
We don't have sufficient data to confidently determine the risk likelihood of SmartUpscale. Use it at your own risk.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
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