1237858 - Installing older version Maintenance Service makes control panel information display the older version again

Status: RESOLVED DUPLICATE of bug 1211815

(Toolkit :: Application Update, defect)

Description

[Spampot]

User Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:43.0) Gecko/20100101 Firefox/43.0
Build ID: 20160105164030

Steps to reproduce:

This is sort of Bug 862894 reloaded (where I was told to file a new bug), maybe due to Firefox now being 64-bit. In short:

System: Windows 8.1 (64-bit)
Previously installed:
- Firefox 43.0.2 (64-bit)
- Mozilla Maintenance Service 43.0.2
- Thunderbird 38.5.0

1.) After over-installing Thunderbird 38.5.1, also Mozilla Maintenance Service reports itself as "38.5.1" in the Control Panel. => BUG!

2.) After over-installing Firefox 43.0.4 (64-bit), Mozilla Maintenance Service reports itself as "43.0.4" in the Control Panel.

Comment 1

[Spampot]

Now I had the chance to also check a pure 32-bit scenario again (on a 64-bit Windows 8.1, however):

System: Windows 8.1 (64-bit)
Previously installed: Firefox 43.0.2 (32-bit), Mozilla Maintenance Service 43.0.2, Thunderbird 38.5.0

After over-installing Thunderbird 38.5.1, also Mozilla Maintenance Service reports itself as "38.5.1" in the Control Panel. => BUG!

So it seems that Bug 862894 is back again.

Comment 2

[Spampot]

In the meantime (Firefox 54.0, Thunderbird 52.2 resp. 52.2.1) the situation has become worse:
Updating TB 52.2 to 52.2.1 by over-installing (with FF 54.0 64-bit installed beforehand) will now create an independent second "Mozilla Maintenance Service" entry in the software list (Control Panel\Programs and Features) - one saying "Version 54.0" and one saying "Version 52.2.1".

Comment 3

[Spampot]

Still the same behavior with installing Thunderbird 52.9.0 (32-bit) over an existing Firefox 61.0 (64-bit):
Two "Mozilla Maintenance Service" entries appear in the software list, one saying "Version 61.0" and one saying "Version 52.9.0".
And, unlike Thunderbird, the Firefox installer still does it right: Over-installing Firefox again removes the second 52.9.0 entry.

Comment 4

[Robert Strong (they/them - no direct email)]

This is due to the installer overwriting the registry entries that are displayed. The maintenance service itself isn't downgraded. Duping to an older bug for the same issue.