If you disconnect internet and restart the browser the extension shows no emoji at all. Perhaps it is fetching them from the internet in spite of the local storage?

It does for me,

of course, you have to have downloaded the images so that they are cached first.

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[–] Enjoyer_of_Games@hexbear.net 2 points 4 days ago (1 children)

They are definitely downloaded first, they still show up after disconnection while the browser remains open and then disappear on browser restart. This is using librewolf, maybe it handles local cache differently than firefox?

[–] edie@lemmy.encryptionin.space 2 points 4 days ago* (last edited 4 days ago) (1 children)

I believe Librewolf disables cache.

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[–] Enjoyer_of_Games@hexbear.net 2 points 3 days ago

I don't know if this is helpful but I have discovered that my page with every hexbear emoji which is snappy on librewolf is very slow on chromium and causes it to crash..