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Can't save images as .PNG on some sites - only as .WEBP

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I can't save some images as .PNG for some sites I use. (ex. any of the wikis on fandom.com) .WEBP images are completely useless to me - my version of Photoshop (CC 2018) can't even load them. It still saves as .WEBP even if the URL itself says it's a .PNG file. I don't want to go through the hassle of having to convert them every time I want to download an image, I just want it like it was before where I could just download it as a .PNG file. Is there a way to disable saving images as WEBP, like an extension or something in about:config?

I can't save some images as .PNG for some sites I use. (ex. any of the wikis on fandom.com) .WEBP images are completely useless to me - my version of Photoshop (CC 2018) can't even load them. It still saves as .WEBP even if the URL itself says it's a .PNG file. I don't want to go through the hassle of having to convert them every time I want to download an image, I just want it like it was before where I could just download it as a .PNG file. Is there a way to disable saving images as WEBP, like an extension or something in about:config?

Chosen solution

philipp said

hi, you could try the tweak discussed at https://old.reddit.com/r/firefox/comments/alm5pq/firefox_image_saves_into_chrome_html_document_webp/efi7smg/

Doesn't work for the site I used as an example. However, I did find that removing "image/webp" from "network.http.accept.default" in the about:config page did solve the problem.

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philipp said

hi, you could try the tweak discussed at https://old.reddit.com/r/firefox/comments/alm5pq/firefox_image_saves_into_chrome_html_document_webp/efi7smg/

Doesn't work for the site I used as an example. However, I did find that removing "image/webp" from "network.http.accept.default" in the about:config page did solve the problem.

Modified by repladux

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I tried both solutions here but neither of them worked! Firefox is still saving as .webp

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If the website only supports WebP images then you are out of luck.

You can remove "image/webp," from the accept prefs to prevent getting WebP images send by the server.

  • image.http.accept = */* (default: image/webp,*/*)
  • network.http.accept.default = text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 (default: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8)
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No. These are PNG files. Always have been.