There is an excellent answer here on how to downgrade a package, but I would like to know how to force apt-get and Software Updater to skip a version.
For example, the current release of Firefox is 36.0. This particular build is broken in that it cannot open external urls. I've had to downgrade to version 28.0, but Software Updater is now prompting me to update back to 36.0. I would like to skip this version and upgrade to the next which I'm sure will be fixed.