if you want Saving images localStorage,you can use it
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Firefox - https://addons.mozilla.org/en-US/firefox/addon/maoxian-web-clipper/
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Chrome - https://chrome.google.com/webstore/detail/maoxian-web-clipper/kjahokgdcbohofgdidndeiaigkehdjdc
it has more power,
https://mika-cn.github.io/maoxian-web-clipper/native-app/index.html
many web use .webp,but obsidian not support it,
Is there a way to add a gif to a Markdown file? - Stack Overflow - Vivaldi
if you want use .webp,you can use syntax.