Closing the bug, as (as Sébastien stated) the package does not exist
anymore.
https://launchpad.net/distros/ubuntu/+source/totem/1.5.90-0ubuntu1
illustrates this.
** Changed in: totem (Ubuntu)
Status: Needs Info => Rejected
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t-g-firefox-plugin depends on t-g 1.4.1-0ubuntu4
https://launchpad.net/bugs/54060