Heavy usage of a certain userscript results in NS_ERROR messages

[hurda]

I have no reliable way to reproduce these error-messages, so I'm just basing this report on my observations.

The userscript in question is YouTube Link Title. It changes plain YouTube-links to display the video's title.

Whenever I see that there were many links, which had been modified by this script, on message boards, the following error would be shown in the console:

Sat Jul 13 2013 23:38:08
Error: NS_ERROR_NOT_INITIALIZED: Component returned failure code: 0xc1f30001 (NS_ERROR_NOT_INITIALIZED) [nsIDOMJSWindow.setTimeout]
Source file: file:///C:/Users/user/AppData/Roaming/Mozilla/Firefox/Profiles/wrtk00m5.sm/gm_scripts/YouTube_Link_Title/83584.user.js
Line: 85

Most of the time, shortly after these errors begin to appear, the following error would popup when ever I middle-click on a page for autoscrolling:

Error: 'JavaScript component does not have a method named: "handleEvent"' when calling method: [nsIDOMEventListener::handleEvent] = NS_ERROR_XPC_JSOBJECT_HAS_NO_FUNCTION_NAMED
Source file: chrome://global/content/bindings/popup.xml
Line: 112

I'm only reporting this now because of popups being mentioned in #1762, and maybe those two problems have some correlation.

EDIT:
Another reason for this report is that this userscript is generating a submenu in the GM-menu, hence the reference to #1762.

[hurda]

After more testing, I was able to replicate the handleEvent-error in 22 and 23 without any addons installed, but not in 24 or 25. No idea if the bug is actually fixed, or if the new error console is just not showing it.

So I guess this issue can be closed, as it's a bug of the browser.

Anyway, should I file a new issue for the nsIDOMJSWindow.setTimeout-error, or is that just an error in the userscript, for stuff like waiting to long for a server-reply or something?

[arantius]

The best thing to do is to try to write a reduced test case, without Greasemonkey involved. Like I did here:
https://bugzilla.mozilla.org/show_bug.cgi?id=846316
Using Scratchpad and chrome privileges is easy and easily reproducible.

If you can do so, close this bug and report one upstream with Firefox, because it's a bug on their side and not ours. If you can do so in release versions but not nightlies, then it's probably already fixed so just close this.

[hurda]

Ok, thank you for the advice.