1472706 - Favicons missing for some tabs

Status: RESOLVED DUPLICATE of bug 1472474

(Firefox :: Tabbed Browser, defect)

Description

[Martin Giger [:freaktechnik]]

Some pinned tabs have lost their favicon for me (on both Windows and Linux) in Nightly. Sadly I don't remember when it started happening.

I assume the favicon is not restored properly or similar. All of the sites fetch the favicon according to the network inspector when reloading. Affected sites includes:
 - WhatsApp Web
 - Telegram Web
 - Mozilla Discourse instance

All of them seem to have a service worker and the network inspector says the service worker interacted with the favicons.

When opened as their own tab, the nightly logo is shown instead of the favicon (however in the awesomebar I see the correct favicon, probably cached in places).

I do see the following error in the browser console when loading one of those sites:

> [Exception... "Favicon load from https://web.telegram.org/favicon.ico was cancelled."  nsresult: "0x804b0002 (NS_BINDING_ABORTED)"  location: "JS frame :: resource:///modules/ContentLinkHandler.jsm :: cancel :: line 107"  data: no]
> cancel resource:///modules/ContentLinkHandler.jsm:107:27
> load resource:///modules/ContentLinkHandler.jsm:360:7
> InterpretGeneratorResume self-hosted:1267:8 next self-hosted:1222:9

Comment 1

[Ed Morley [:emorley]]

I'm presuming this is due to bug 1453751.

Comment 2

[Dave Townsend [:mossop]]

This is likely a combination of things, the only thing I don't yet understand is what is going on with telegram so I'm going to dupe this to another bug about that.