WebP images not being served properly

  • Resolved Rose

    (@thorned-rose)


    5 years, 5 months ago

    WebP images are not being served to my browser (Firefox 69). I have the following settings enabled: Optimise Automatically, Optimisation Cron, Optimise Original Images, Optimise WebP Versions, Image WebP Replacement. (WebP Attribute To Replace was left at default and WebP For Extra srcset is left at default Off)

    I ran LiteSpeed Cache Image Optimisation and it says “All done”.

    I have checked that webp files are available. e.g.:
    JPG – https://ahbc.space/wp-content/uploads/WelcomeWillow-25-of-42.jpg
    WEBP – https://ahbc.space/wp-content/uploads/WelcomeWillow-25-of-42.jpg.webp

    .htaccess has the correct rewriteconds/rewriterule.

    Chromium correctly gets served WEBP mostly (I’m on Linux). On another computer Internet Explorer and Edge also get served the JPGs.

    The only thing I can find in the debug log (set to advanced) that’s remotely relevant when loading on Firefox is:

    
09/20/19 10:48:04.117 [=CLI=ahbc 1 f2A] [Img_Optm] preparing images to push
09/20/19 10:48:04.124 [=CLI=ahbc 1 f2A] [Img_Optm] optimize bypass: no image found

    After clearing the log, and loading the site in Chromium, I get the following in the log:

    [Media] webp replacing: ....jpg => LSC_Media->replace_webp()@851 => LSC_Media->webp_srcset()@834 => WP_Hook->apply_filters()@288 => 
... /wp-includes/media.php@208
[Media] - replaced to: ... .jpg.webp

    However, I also get a lot of

    [Util] file not exist:... .jpg.webp
[Media] -no WebP file, bypassed

    Which seems to be on the smaller images/thumbnails sizes as opposed to the originals.

    I’m at a loss as to why Firefox is not getting served the webp images and Chromium is only some.

    The page I need help with: [log in to see the link]

Viewing 1 replies (of 1 total)

  • Hi @thorned-rose,

    According to Mozilla org, Firefox has removed image/webp on http_accept header since version 66, so our source code and .htaccess file do not support webp replacement on Firefox browser.

    Currently, we do not have a safe way to detect are the user’s FF browser supporting Webp because the user can turn it off on about:config settings tab.

    but if you wish to force serving Webp on version >65 Firefox, you can try to update the following code:

    You need to update the .htaccess file as:
    https://www.diffchecker.com/fAPSFT81

    and the media.class.php plugins/litespeed-cache/inc/media.class.php as:
    https://www.diffchecker.com/TJC5h3Rq

    Thanks.

Viewing 1 replies (of 1 total)
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