I thought I would share a quick little favorite of mine that I always use. It’s called Google Browser Sync. If you are like me and have collected hundreds of bookmarks over the years, this is a perfect backup for your bookmarks. This little plug-in works using a Gmail account and backs up and saves all your bookmarks in Firefox as well as saves the tabs that you had open just before you close your browser. The next time you open your browser, Google Browser Sync asks you if you want to open the tabs from your prior session.
Another bonus is if you have multiple computers with Firefox installed and Google Browser Sync, your bookmarks and tabs follow you!
Here is a link to the site where you can download the plugin: http://www.google.com/tools/firefox/browsersync/
Check it out and let me know what you think.