This just happened to me this morning, after clicking on a couple of links in a message in Thunderbird.
After setting Focus Stealing Prevention on Firefox' window from "Normal" to "High", this behavior stopped. But unfortunately, with "High" now I occasionally get password prompts or similar dialog box which pop up behind firefox, and can easily be missed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/272171 Title: Firefox should not steal focus when told by another application to open a link To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubufox/+bug/272171/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs