Análises de Don't "Accept" image/webp
Don't "Accept" image/webp por jscher2000
Análise de Bjorn Roesbeke
Avaliado em 4 de 5
por Bjorn Roesbeke, há 4 anosTLDR: This addon genuinly tries to do what it promises but Firefox defaults + servers = useless addon.
The addon does something, but it's not resulting in refusal of webp images.
By clicking the "W" button on the toolbar, the sent "Accept" headers either include or don't include "image/webp", but it's of no use at all if the default following is "*/*".
It's possible to change the value of the "image.http.accept" key in "about:config" to (for example)
image/png,image/jpeg;q=1
but this addon will then not be able to change this value anymore.
Furthermore, websites such as Youtube (Google in general) just plain refuse to offer anything but webp, even if Firefox does not indicate support for it in the "Accept" header. You may need to fool these websites in assuming you're using an old browser by changing or emptying the "general.useragent.override" key.
Edited at 14/01/2024: changed rating 2»4; addon is not to blame for servers ignoring user preferences, as indicated in response by addon author.
The addon does something, but it's not resulting in refusal of webp images.
By clicking the "W" button on the toolbar, the sent "Accept" headers either include or don't include "image/webp", but it's of no use at all if the default following is "*/*".
It's possible to change the value of the "image.http.accept" key in "about:config" to (for example)
image/png,image/jpeg;q=1
but this addon will then not be able to change this value anymore.
Furthermore, websites such as Youtube (Google in general) just plain refuse to offer anything but webp, even if Firefox does not indicate support for it in the "Accept" header. You may need to fool these websites in assuming you're using an old browser by changing or emptying the "general.useragent.override" key.
Edited at 14/01/2024: changed rating 2»4; addon is not to blame for servers ignoring user preferences, as indicated in response by addon author.
Resposta do desenvolvedor
publicado há 4 anos> The addon does something, but it's not resulting in refusal of webp images. ...
> Furthermore, websites such as Youtube (Google in general) just plain refuse to offer anything but webp, even if Firefox does not indicate support for it in the "Accept" header.
Hi Bjorn, the purpose of this extension is to discourage server farms from re-compressing PNG and JPEG images as WebP images on the fly to save bandwidth, since this complicates saving in the original formats. It is not a goal of this extension to prevent sites designed to serve WebP images from doing so.
> You may need to fool these websites in assuming you're using an old browser by changing or emptying the "general.useragent.override" key.
That might work, but some sites might serve less useful pages, so you'll have to test and see what is the best compromise.
> Furthermore, websites such as Youtube (Google in general) just plain refuse to offer anything but webp, even if Firefox does not indicate support for it in the "Accept" header.
Hi Bjorn, the purpose of this extension is to discourage server farms from re-compressing PNG and JPEG images as WebP images on the fly to save bandwidth, since this complicates saving in the original formats. It is not a goal of this extension to prevent sites designed to serve WebP images from doing so.
> You may need to fool these websites in assuming you're using an old browser by changing or emptying the "general.useragent.override" key.
That might work, but some sites might serve less useful pages, so you'll have to test and see what is the best compromise.
146 análises
Resposta do desenvolvedor
publicado há 2 diasHi, it depends on the site design. You can test on Total Wine glassware page (https://www.totalwine.com/accessories-more/accessories/glassware/c/001555). Use the Page Info dialog (Ctrl+i, Mac: Command+I) Media list to check the image formats. Reload after changing the "Strip image/webp" setting and check again. With the extension stripping webp, the original formats (PNG, JPEG) are used. If that doesn't work for you, check this article just in case: https://support.mozilla.org/kb/extensions-private-browsing
If there are specific sites you would like help with, you can try creating a new issue at https://github.com/jscher2000/dont-accept-webp/issues or emailing me at jscher2000@outlook.com.- Avaliado em 5 de 5por Davi, há 2 meses
- Avaliado em 5 de 5por Sunny, há 3 mesesIt doesn't always work on every webpage (half the time on Aliexpress), however it works most of the time.
Resposta do desenvolvedor
publicado há 3 mesesHi pjcamp, thank you for your report.
This extension makes a change to how Firefox requests images, but many sites ignore the change. If there is a specific site you want to mention, you can contact me by creating a new Github issue on https://github.com/jscher2000/dont-accept-webp/issues or emailing jscher2000@outlook.com.
On the other hand, if it fails on every single site, check for this issue: https://support.mozilla.org/kb/extensions-private-browsing
There also are some pages that give Firefox multiple format options (picture tag/source tags) and it selects WebP for some reason. I don't have a fix for that yet.- Avaliado em 5 de 5por Crowbar Scientist, há 4 meses
- Avaliado em 4 de 5por Usuário 18285487 do Firefox, há 7 mesesGreat 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). - Avaliado em 5 de 5por Usuário 13807639 do Firefox, há 9 mesesTipTop, endlich wieder vernünftige Datei-endungen
- Avaliado em 5 de 5por Dan, há 10 meses
- Avaliado em 5 de 5por oguz, há 10 meses
- Avaliado em 5 de 5por Major Gear, há um anoThis addon installs easily and does what it says on the tin. I recommend this addon.
- Avaliado em 5 de 5por Usuário 11803080 do Firefox, há um ano
- Avaliado em 5 de 5por Usuário 18347256 do Firefox, há um anoExtremely useful and efficient, now I can save an image in it's original jpg or png format, instead of paying 2 conversions jpg-webp then webp-jpg. Should be the default when saving a jpg or png image.