My son noticed an odd behaviour with one particular website, and I fail to find what may be prompting it, may I ask for an opinion or an advice, please?
Here's the thing: when you right click to download any image present on https://minecraft.fandom.com/wiki/Minecraft_Earth , with Firefox, you're downloading a webp.
Whereas, with Edge or Chrome, you're downloading a .png - AKA (son confirming) the original, non-recompressed file.
My son was adamant on that aspect, it's only Firefox that is affected, the other browsers (with a Chromium engine, I don't have an Apple device to test with Safari's) allow to download the original, genuine pages. Unlike the webp versions that have minor compression artifacts. And against the loss of information stemming from excessive compression, no "webp to PNG" extension will do the job.
I tested it on 3 computers, at home, all using Windows 10, from an ethernet connexion using a fiber line (either ethernet > fiber or wifi > fiber), so I think I can rule out AMP versions and network optimizations.
So... what, then O_o
I wondered if the server would send different HTML to different browsers, let's check it out
Sent to Firefox
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<img alt="MCE key art.webp" src="https://static.wikia.nocookie.net/minecraft_gamepedia/images/d/d3/MCE_key_art.webp/revision/latest/scale-to-width-down/200?cb=20210910124918" decoding="async" data-image-name="MCE key art.webp" data-image-key="MCE_key_art.webp" data-src="https://static.wikia.nocookie.net/minecraft_gamepedia/images/d/d3/MCE_key_art.webp/revision/latest/scale-to-width-down/200?cb=20210910124918" class=" lazyloaded" width="200" height="310">
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<img alt="MCE key art.webp" src="https://static.wikia.nocookie.net/minecraft_gamepedia/images/d/d3/MCE_key_art.webp/revision/latest/scale-to-width-down/200?cb=20210910124918" decoding="async" width="200" height="310" data-image-name="MCE key art.webp" data-image-key="MCE_key_art.webp" data-src="https://static.wikia.nocookie.net/minecraft_gamepedia/images/d/d3/MCE_key_art.webp/revision/latest/scale-to-width-down/200?cb=20210910124918" class=" ls-is-cached lazyloaded">
At this point, I'm out of leads. Every search I run ends up in people recommending an extension to convert from webp to png, and missing on the entire file format discrimination among browsers, but my google-fu sucks, I must admit.
Would someone have an idea, please? Thanks a lot if you can help!