firefox-61.0 update … i had experienced browser slowing down to a crawl … ended up being adblock-plus addon … apparently, i had disabled one of the three filter-lists. as always, first thing one should try is disabling all addons. thought i'd end up having to reinstall adblock-plus … but wasn't necessary. just disabled the addon and closed down firefox … re-enabled and updated the filters. good as new.
so … this post is just in case someone else has similar issue … thanks.
so … this post is just in case someone else has similar issue … thanks.