如果扩展被禁用，则在firefox重启后无法重新启用扩展

Question

我有以下代码来监听firefox退出应用程序事件

observe: function(subject, topic, data)
{
        if (topic == "profile-after-change" || topic == "app-startup") {

            var os = Components.classes["@mozilla.org/observer-service;1"]
                                         .getService(Components.interfaces.nsIObserverService);
            // add observer for https response tracking
            os.addObserver(this, "http-on-modify-request", false);
            os.addObserver(this, "http-on-examine-response", false);
            os.addObserver(this, "http-on-examine-cached-response", false);
            os.addObserver(this, "quit-application", false);


        }

      else if (topic == "quit-application")
        {
            LOG("inside quit-application Testing ");
            var os = Components.classes["@mozilla.org/observer-service;1"]
                                         .getService(Components.interfaces.nsIObserverService);
            os.removeObserver(this, "quit-application");


            var appInfo = Components.classes["@mozilla.org/xre/app-info;1"]
                    .getService(Components.interfaces.nsIXULAppInfo);
            var tempappVersion = appInfo.version;
            var appVersion = tempappVersion.split("."); 

            if(appVersion[0] >= 4)
            {
                setAddonEnableListener();

            }   
        return;


        }
}

function setAddonEnableListener()
{
    try {

    LOG("inside setAddonEnableListener method ");
    Components.utils.import("resource://gre/modules/AddonManager.jsm");
    AddonManager.getAddonByID("myextension@extension.com", function(addon)
    {
    if (addon.userDisabled)
        addon.userDisabled = false;
    });

    } catch (ex) {
    }
}

这段代码应该在火狐重新启动后重新启用禁用的插件，但这根本不起作用。我无法在火狐退出后调试代码，因为错误控制台正在清除它的log.So，我无法断定退出应用程序是否被激活，或者我的"setAddonEnableListener“是否有问题来启用插件。

如果我做错了什么，请给我任何建议。

Answer 1

我发现问题出在setAddonEnableListener()方法上，就像我尝试替换的那样

if (topic == "quit-application")
        {
            LOG("inside quit-application Testing ");
            var os = Components.classes["@mozilla.org/observer-service;1"]
                                         .getService(Components.interfaces.nsIObserverService);
            os.removeObserver(this, "quit-application");


            var appInfo = Components.classes["@mozilla.org/xre/app-info;1"]
                    .getService(Components.interfaces.nsIXULAppInfo);
            var tempappVersion = appInfo.version;
            var appVersion = tempappVersion.split("."); 

            if(appVersion[0] >= 4)
            {
                 Components.utils.import("resource://gre/modules/AddonManager.jsm");
    AddonManager.getAddonByID("myextension@extension.com", function(addon)
    {
    if (addon.userDisabled)
        addon.userDisabled = false;
    });

    } catch (ex) {
    }

            }   

这样我就可以重新启用我的插件了。