The livemark service does sqlite io on the main thread. The default livemark
has become pretty hard to discover now that we have hidden the bookmarks
toolbar, so there probably won't be a lot of new users using it. I suggest we
get rid of it so that we're not paying these IO costs for a feature that new
users are unlikely to use.
--HG--
extra : rebase_source : 1ec9c111077e3dbda1316116928582c20a0148f7
