250890 - installer should detect previous installation and give option to uninstall

Status: VERIFIED DUPLICATE of bug 250495

(Firefox :: Installer, enhancement)

Description

[Mark Takeuchi]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040707 Firefox/0.9.2
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040707 Firefox/0.9.2

When using the installer while a previous version is installed, I think is
should detect that previous version and uninstall the previous version
(especially if the user is installing into the same directory). 

If one installs to the old directory, it overwrites the old version but the
entry in "Add/Remove Programs" is still there so we end up with 2 entries while
only one installation actually exists. Plus it's already considered go practice
to install into a clean dir so the installer should take care of that.

Perhaps a prompt saying, "there's an older version of Firefox in that dir
already, do you want to uninstall it before installing this new one?". That way
if someone want to run multiple versions they are still given the option to not
uninstall the older ones.

Reproducible: Always
Steps to Reproduce:
1. Install 0.9 from Installer
2. Install 0.9.2 from installer (choose the same dir as from step #1)


Actual Results:  
Goto "Add/Remove Programs", there is an entry for 0.9 and 0.9.2.

Expected Results:  
0.9.2 should replace 0.9 in the list

Comment 1

[Michael Hendy (Hendikins)]

*** This bug has been marked as a duplicate of 250495 ***