580912 - No window top when running FF 4.0b1 with the FF 3.6 profile

Status: RESOLVED DUPLICATE of bug 574833

(Firefox :: Migration, defect)

Description

[Scoobidiver (away)]

User-Agent:       Mozilla/5.0 (Windows; Windows NT 6.1; WOW64; rv:2.0b2) Gecko/20100720 Firefox/4.0b2
Build Identifier: Mozilla/5.0 (Windows; Windows NT 6.1; WOW64; rv:2.0b2) Gecko/20100720 Firefox/4.0b2

A FF 3.6 is installed on my computer.
After installation of FF 4.0b1, there is no window top on my FF 4.0b1.

To have a normal FF 4.0b1 appearance, you must launch firefox with the -p option and create a new profile.

Reproducible: Always



Expected Results:  
Here is a list of possible solutions (not exhaustive) to prevent this migration problem :
1. Creation of a 4.0 profile even if a 3.6 profile exists (disadvantage : loss of profile : bookmarks, extensions, ...);
2. Migration of the 3.6 profile to a compatible 4.0 profile (disadvantage : no backward compatibility) ;
3. Copy of the 3.6 profile in a 4.0 profile, and start of firefox with -p option (disadvantage : necessary to launch FF 3.6 and 4.0 with the -p option)
4. Copy of the 3.6 profile in a 4.0 profile, and add in Firefox 3.6 and 4.0 an automatic detection of the profile format

Comment 1

[Scoobidiver (away)]

Attachment: Screen shot of FF 4.0b1 with no window top