I asked about automatic backup of bookmarks and received the following answer:You can make Firefox 3 create an automatic HTML backup (bookmarks.html) when you exit Firefox if you set the pref [http://kb.mozillazine.org/browser.bookmarks.autoExportHTML browser.bookmarks.autoExportHTML] to true on the about:config page. That backup is created by default in the profile folder as bookmarks.html, but you can set the file name and path via the pref [http://kb.mozillazine.org/browser.bookmarks.file browser.bookmarks.file] on the about:config page. I went to about:config page and toggled browser.bookmarks.autoExportHTML to “Yes” and it’s working. However, I want to change the file location, but I can’t find browser.bookmarks.file in the list.