This extension is great, but it is limited by the way things are trending online these days. More and more sites aren't letting you block them from sending the stupid WebP format to your browser, but for the ones that still allow it, this extension is perfect. Until more graphic editing programs natively support this new format, I will continue to use this extension to block it as much as I can.

People saying it doesn't work clearly haven't bothered to read the developer's notes about it. They explicitly state "sites are MORE LIKELY to send JPEG and PNG format images." Nowhere is there a guarantee that this will block WebP, it simply stops Firefox from telling sites it accepts it. Some sites ignore that and send WebP anyway, while others will comply and send you the original format, whether that be JPG, PNG, whatever.

I find that somewhere between half and two thirds of sites I visit that typically send WebP images will send the original formats when I use this extension. That's not perfect, but it's better than what I get without it, and with the way browsers and sites talk to each other, I don't think it can be improved beyond that.

Невероятно полезная вещь, наконец то открывает jpeg а не богопротивный webp

Doesn't work.

Does not work at all, not even after reloading the page or restarting the browser.

does not work 😭

It works. I get jpeg sometimes instead of webp.

It simply DONT WORK

It doesn't always work on every webpage (half the time on Aliexpress), however it works most of the time.

Doesn't do anything. Webp images come anyway.

I wonder how

Great idea. Lossless WebP is generally a superior alternative to Png (except it cannot handle HQs beyond 16k on a side), but when you get served a webp on a web site, there is a 95% chance it is just a Jpg that has gone through another round of lossy compression, a different type, at a lower bit rate = worse quality (fewer fine details).

In an ideal world, the digital master would be encoded as both Jpg/Png and Jxl, and the browser would have an option built in to preference one format over the other. JpegXl is the best new format. Jpeg2000 was decent but I don't think any browsers support it, and it even has a lossless format.

Unfortunately, this extension only works on some sites. Some are still sending me Webp,oravif (less often) and even twice I got a Jpegxl (I wish to force jpeg from these bossy CDNs that are enforcing inferior formats upon me).

Doesn't work.

TipTop, endlich wieder vernünftige Datei-endungen

Works as intended!

Works as intended. Thank you very much jscher2000

Good

This addon installs easily and does what it says on the tin. I recommend this addon.