Instability between upgrade and restart (e.g. Assertion failed)

[Zoubidoo]

Binary package hint: mozilla-firefox

When firefox is upgraded with apt-get, a firefox restart is required. But between the upgrade and the (firefox) restart, firefox behaves abnormally. It is not always practical to restart firefox immediately, e.g. the user might be writing an email or filling in a form. Errors include: assertion failed when a URL is entered in the URL bar, right click not giving context-sensitive menus (e.g. save image when over an image). Expected behaviour: Firefox should continue to work normally.

To reproduce:
 - start firefox
 - upgrade firefox (apt) without stopping firefox
 - input a URL on the address bar

This happened again today on the release of 3.09

$ apt-cache policy firefox
firefox:
  Installed: 3.0.9+nobinonly-0ubuntu0.8.04.1
  Candidate: 3.0.9+nobinonly-0ubuntu0.8.04.1
  Version table:
 *** 3.0.9+nobinonly-0ubuntu0.8.04.1 0
        500 http://gb.archive.ubuntu.com hardy-updates/main Packages
        500 http://security.ubuntu.com hardy-security/main Packages
        100 /var/lib/dpkg/status
     3.0~b5+nobinonly-0ubuntu3 0
        500 http://gb.archive.ubuntu.com hardy/main Packages

$ lsb_release -rd
Description: Ubuntu 8.04.2
Release: 8.04

Attached a screenshot of failed assertion which occurs when inputting an address in the URL bar.

[John Vivirito (gnomefreak)]

We dontr support firefox-2.0 any longer. the package "firefox" is 2.0 the package "firefox-3.0" is the dorrect one. Anyway i marked as a duplicate

[Zoubidoo (zoubidoo)]

??? I never mentioned firefox-2.0.

Thanks for the link to the duplicate it looks appropriate.