By default Firefox remembers if you left the bookmarks sidebar open or closed. This add-on will always make sure anytime you open Firefox, the bookmarks sidebar is open.
This page is part of the LegacyCollector website.
Disclaimer: All material on this site is property of their respective owners and available under
open licenses to the best of our knowledge. If you are an author and would like anything removed,
then please write an e-mail to legacy [at] collector dot org.