Bug 236616 - Data URI favicon doesn't seem to work
Summary: Data URI favicon doesn't seem to work
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Images (show other bugs)
Version: Safari 15
Hardware: Mac (Intel) macOS 12
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2022-02-14 15:43 PST by Eric Case
Modified: 2022-10-24 13:33 PDT (History)
7 users (show)

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Description Eric Case 2022-02-14 15:43:06 PST 
I've documented my attempts to get this working in this repo: https://github.com/case/safari-favicons-base64

I tried the suggestion in this Stack Overflow post: https://stackoverflow.com/a/5199989/890466 -- which suggests that this worked in Mac Safari back in 2011. Perhaps something related has changed or broken since then?

This snippet works fine in latest (as of filing this bug report) Mac Chrome and Firefox:

<link rel="icon" href="data:image/png;base64,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" />

But for some reason I haven't been able to get it working in Safari.

I also have a related Twitter thread about this with @othermaciej here: https://twitter.com/othermaciej/status/1493336261901238272?s=21
Comment 1 Radar WebKit Bug Importer 2022-02-14 16:05:52 PST 
<rdar://problem/88933938>
Comment 2 Maciej Stachowiak 2022-02-20 17:39:21 PST 
On Twitter it was suggested this may be a Safari 15.3 regression.
Comment 3 adam_marcus 2022-10-24 13:33:42 PDT 
Any updates on this?