I am encountering this (or a very similar) problem, but don't have firefox-webdeveloper installed.
phil@ubuntu-x86:~$ sudo apt-get remove firefox-webdeveloper
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package firefox-webdeveloper is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
phil@ubuntu-x86:~$
I also have XML parser problems trying to add bookmarks.
I am encountering this (or a very similar) problem, but don't have firefox- webdeveloper installed.
phil@ubuntu-x86:~$ sudo apt-get remove firefox- webdeveloper webdeveloper is not installed, so not removed
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package firefox-
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
phil@ubuntu-x86:~$
I also have XML parser problems trying to add bookmarks.