1997752 - Firefox Tabs in Taskbar not using correct icon

Status: ASSIGNED

(Firefox :: Web Apps, defect, P2)

Description

[Lee McGuire]

Attachment: Screenshot 2025-11-01 191145.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:144.0) Gecko/20100101 Firefox/144.0

Steps to reproduce:

Go to gmail, or google calendar, click "Add tab to taskbar"

Actual results:

Tab installs on taskbar not with Gmail icon but an ugly black globe, image attached

Expected results:

The Gmail icon should be in taskbar, using the favicon from the site. It works with all other websites

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Firefox::Web Apps' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Ardelean Oana, Desktop Test Engineering [:oardelean]]

Hello, thank you for the bug report!

Managed to reproduce this issue on:

• Firefox Nightly 146.0a1;
• Firefox 145.0b9;
• Firefox 144.0.2;

Tested and reproduced on Windows 10.

Setting as NEW.

Comment 3

[Robin Steuber (she/her) [:bytesized]]

@nrishel Could you please help me set a severity for this?

Comment 4

[Nick Rishel [:nrishel]]

:oardelean is this a consistent issue or does it take a few attempts?

Comment 5

[Ardelean Oana, Desktop Test Engineering [:oardelean]]

This is a consistent issue, I can reproduce from the first try.

STR:

1. Launch Fx.
2. Navigate to calendar.google.com or mail.google.com and login using a valid account.
3. Once logged in, click on the 'Add tab to taskbar' button from the address bar.

Comment 6

[Duncan McIntosh [:dmcintosh]]

We figure out what icon to display using the app's start URL, which for GMail is /mail/. However, favicons are organized per-path, so e.g. /a/b/c can have a different icon than /a/b (which is true, they can be different). The user never actually stays on /mail/ before getting redirected to /mail/u/0, so we don't actually have a favicon saved, giving the black globe.

I'll try looking into fixing this, I suspect this'd open the door to manifest icons (bug 1979462) too.

Comment 7

[Lee McGuire]

(In reply to Duncan McIntosh [:dmcintosh] from comment #6)

We figure out what icon to display using the app's start URL, which for GMail is /mail/. However, favicons are organized per-path, so e.g. /a/b/c can have a different icon than /a/b (which is true, they can be different). The user never actually stays on /mail/ before getting redirected to /mail/u/0, so we don't actually have a favicon saved, giving the black globe.

I'll try looking into fixing this, I suspect this'd open the door to manifest icons (bug 1979462) too.

I have tried to webapp the url mail.google.com/mail/u/0/#inbox and that still shows the black globe, and the same with Google Calendar too.

Comment 9

[Jeff Maher]

(Tuning in from a duplicate ticket: 2001110 where some other sites were problematic too...)

Just wanted to note that I didn't experience this bug until recently. My memory of which Firefox version I started using the new PWA feature is foggy, but it did work as expected before (maybe in v143?). I'm not sure if something changed in Firefox itself, with the sites I'm using, or with Windows 11 -- but just wanted to call out in case that's helpful.

Comment 10

[Duncan McIntosh [:dmcintosh]]

Attachment: Bug 1997752 - If the start URL of a web app doesn't have a favicon, use the URL of the page that was open when it was created. r=nrishel

This only affects shortcut creation; the icon saving should be moved into
TaskbarTabs.sys.mjs to be used for the window icon.

Moving away from the old getFavicon interface was needed to distinguish
whether getting the favicon succeeded. It's also useful in tests,
especially combined with the added encodePNG function, and it will make
manifest icons much easier.

Comment 11

[Ben]

Thanks for looking into this. Looks like chat.google.com has the same issue!