640952 - nsiObserverService doesn't fire profile-before-change event

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[Lior Neudorfer]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.3 Safari/534.24
Build Identifier: 4.0RC1

I'm trying to register an nsIObserverService observer to observe profile-before-change events, in order to cleanup my add-on's local data after it was uninstalled and the browser was about to be closed.
My observer never gets called.

Similar tries with other events (quit-application/-requested/-granted) have only succeeded with the quit-application-requested event.


Reproducible: Always

Steps to Reproduce:
1. Register an observer for profile-before-change events:
Components.classes["@mozilla.org/observer-service;1"].getService(Components.interfaces["nsIObserverService"]).addObserver(ac_observer, "profile-before-change", false);
2. In the observer, do something (pop an alert box/update a localdata preference/...)
3. 
Actual Results:  
The observer never seems to be called.

Expected Results:  
The observer should be called.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

In the process of migrating remaining bugs to the new severity system, the severity for this bug cannot be automatically determined. Please retriage this bug using the new severity system.

Comment 2

[Mike Conley (:mconley) (:⚙️)]

XUL addons no longer exist, which means it's no longer possible for them to try to register nsIObserver's, so we're going to close this one out as INCOMPLETE.