290654 - Installer does not check for previous installations

Status: VERIFIED DUPLICATE of bug 247884

(Firefox :: Installer, defect)

Description

[barryjj]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.7) Gecko/20050414 Firefox/1.0.3
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.7) Gecko/20050414 Firefox/1.0.3

When trying to upgrade releases, the upgrade utility seems to download and run
the new installer.  While this is great, the installer doesn't check for
previous installations -- it seems to just overwrite the previous release.  This
leads to unused registry entries and invalid Add/Remove Program entries.  Trying
to uninstall an older version only leads to uninstalling the current version.

Reproducible: Always

Steps to Reproduce:
1. Install backlevel version of firefox.
2. Download new code and run install or use the upgrade check utility.
3. Run as normal.  Add/Remove Programs now has the backlevel and current level
of Firefox listed.  Removing one causes Firefox to be removed completely.

Actual Results:  
Described above.

Expected Results:  
Installer should check for previous versions and uninstall them before
continuing the install/upgrade.

Comment 1

[Matthias Versen [:Matti]]

*** This bug has been marked as a duplicate of 247884 ***