Found in

• Nightly 107.0a1

Affected versions

• Nighty 107.0a1
• Firefox 106.0b9
• Firefox 105.0.3

Tested platforms

• Affected platforms: Windows 7

Steps to reproduce

1. Install Firefox using the latest stub installer.
2. After the installation is complete - check that Firefox is pinned to the Task Bar.

Expected result

• On Windows 7 - Firefox should be pinned to the Task Bar.

Actual result

• The latest Nightly 107.0a1 is not pinned to the Task Bar. Tried also with the other Firefox versions - release and beta and sometimes they are pinned and sometimes they're not.

Regression range
Not sure this is a regression as the behavior is pretty inconsistent - I'll investigate more as soon as possible.

If you manage to repro this, please attach the install.log from the installation directory to aid in debugging.

(In reply to bhearsum@mozilla.com (:bhearsum) from comment #1)

If you manage to repro this, please attach the install.log from the installation directory to aid in debugging.

Attached is the 'install.log' from the installation directory. Please let me know if there is anything else I can help with.

I tried a few things to reproduce this. One way that I was:

1. Install Firefox as an administrator (click "Yes" on the UAC prompt) - this one pins just fine.
2. Install Firefox as a regular user (click "No" on the UAC prompt) -- this one does not pin.

My guess is that Windows gets confused somehow because the shortcuts have the same name, but not the same target executable. I can reproduce the same thing on Windows 10. If this is what you're hitting, there's no great fix for it. I suppose we could make a point to use different shortcut names if another install of the same Firefox is detected -- but this is enough of an edge case that it's probably not worth bothering.

Simona, do you have multiple installs of the same version of Firefox (eg: Nightly) at the same time, or even old shortcuts to an install with the same name?

My account is an admin one on Windows 7.
As far as we know, Firefox installed through the stub installer should always pin it to the Taskbar when "Yes" is chosen in the UAC. Is this not the case anymore?
In my case, Firefox is pinned to the Task Bar only when clicking "No" in the UAC.

I've investigated further and the icon is not pinned to the Task Bar since 22nd of December 2017 - link to the installer. Firefox is properly pinned to the Taskbar with the build from 21st.

(In reply to Simona Badau from comment #4)

My account is an admin one on Windows 7.
As far as we know, Firefox installed through the stub installer should always pin it to the Taskbar when "Yes" is chosen in the UAC. Is this not the case anymore?
In my case, Firefox is pinned to the Task Bar only when clicking "No" in the UAC.

It should pin in either case.

What I was trying to describe in my previous comment is that I have found that it sometimes will not pin correctly if there's multiple installs of Firefox with the same name. Is that the case on your test system?

(In reply to bhearsum@mozilla.com (:bhearsum) from comment #5)

What I was trying to describe in my previous comment is that I have found that it sometimes will not pin correctly if there's multiple installs of Firefox with the same name. Is that the case on your test system?

Usually yes, I have multiple installs, but for this particular case, I deleted all the other versions and all the Firefox data.

(In reply to Simona Badau from comment #6)

(In reply to bhearsum@mozilla.com (:bhearsum) from comment #5)

What I was trying to describe in my previous comment is that I have found that it sometimes will not pin correctly if there's multiple installs of Firefox with the same name. Is that the case on your test system?

Usually yes, I have multiple installs, but for this particular case, I deleted all the other versions and all the Firefox data.

If you had old shortcuts around, that may also cause the issue. Can you reproduce in a cleaner environment?

(In reply to bhearsum@mozilla.com (:bhearsum) from comment #7)

If you had old shortcuts around, that may also cause the issue. Can you reproduce in a cleaner environment?

Tried again, and deleted all the shortcuts I could find and I can no longer reproduce this - the icon is now properly pinned to the Task Bar.

OK, so this is a real bug -- existing shortcuts can interfere with taskbar pinning -- but probably not one worth fixing.

Thanks for all the extra info in assessing this!