Thanks for taking the time to report this issue, but I'm closing this as
it is not a bug (Add/Remove only shows packages with menu entries by
design) and, additionaly, adblock will be replaced soon by Adblock Plus
in the repositories.
** Changed in: mozilla-firefox-adblock (Ubuntu)
Status:
there is a similar business with the mozilla-livehttpheaders extension.
I installed it, it is now visible as installed in synaptic, but the
Ubuntu Install/Remove extensions dialogue has no entry for it and the
web browser actually doesn't seem to function as if it were installed,
since there is no
