Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

View Source stops working when running multiple instances in FF4

  • 3 replies
  • 13 have this problem
  • 3 views
  • Last reply by Chris C.

more options

I run two instances of FF each under its own profile. I have different add-on, etc, for each.

Since upgrading to FF4, View Source is not working in the second instance. After pressing Command-U or otherwise choosing View Source, nothing happens. If I go to the "Window" menu, I see a window listed "Source of ..." but this window is not visible in any way and I can't find it or switch to it.

I run two instances of FF each under its own profile. I have different add-on, etc, for each. Since upgrading to FF4, View Source is not working in the second instance. After pressing Command-U or otherwise choosing View Source, nothing happens. If I go to the "Window" menu, I see a window listed "Source of ..." but this window is not visible in any way and I can't find it or switch to it.

All Replies (3)

more options

Seems to work ok for me but I am using windows XP. I have firefox 3.6 & 4.0 both open, and both have now opened view source windows. Possibly some combination of extensions causes the problem.

more options

In my case I am running two instances of 4.0. I'll give it a try with extensions disabled.

more options

I managed to get it working again by using the "reset toolbars" option in the safe mode startup. I haven't figured out the root cause but this at least fixes it.