Rated 5 out of 5 stars
Problem solved, now it highlight all saved words. I uninstalled vocabulary highlighter and then deleted the "vocabhighlighter" folder in "AppData\Roaming\Mozilla\Firefox\Profiles". Crash problem after having more than 200 words added to the list.This user has a previous review of this add-on.
Hi. Vocabulary Highlighter won't run with Firefox 15 or later. The crashing issue will be fixed in a new version of the add-on.