266859 - Don't change registry if "No" to "Make TB your default?"

Status: RESOLVED WORKSFORME

(Thunderbird :: General, defect)

Description

[Mike Cowperthwaite]

I'm switching back and forth between TB 0.8 (for my actual use) and TB 0.8+ 
nightlies (to test bugs).  Every time I start one of these versions after 
starting the other, I get prompted whether I want TB to be my default mail 
program.
Ideally, it wouldn't even ask -- but that would break the behavior for people 
with more normal setups.
However, if I say NO, then TB should just leave the registry alone.  Not only 
does it *reset* the default mail program registry in that case (copying back 
whatever junk was written into the Mozilla 'Desktop' registry backup), but it 
seems to ding the browser settings as well -- after this has happend, when I 
start Mozilla, it prompts me to make it the default browser.

This behavior probably occurs in Firefox, too; I know it occurs in MailNews (for 
the default mail client only, in that case; it doesn't touch the browser 
setting).

xref bug 255225 comment 8.

Steps to reproduce:
1) Install two different versions of TB in two different directories.
2) Start one; when prompted to make it the default: Yes.
3) Exit the first; start the other.  When prompted to make it the default: No.
4) Exit the second, restart the first.

Actual result:
Prompted *again*

Expected result:
STOP ASKING ME ALREADY!

Possibly related to bug 266168.

Comment 1

[Mike Cowperthwaite]

I've just seen the correct behavor when starting TB 0.9+1112 while TB 0.9 is the 
default, so  =>WFM