Some charger icons don't work in Firefox

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/some-charger-icons-dont-work-in-firefox/
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In Firefox, some charger icons show up as fuzzy red boxes. https://imgur.com/a/Jz8sKSm for an example