If your changes to your bookmarks do not appear when you restart Firefox, the issue may be that your bookmarks file is write-protected. A write-protected file cannot be changed, which prevents your edits to your bookmarks from being saved. Firefox 3: Windows:To enable writing of your bookmarks file:
1. Go to your Firefox profile folder. 2. Right-click the file places.sqlite, and select Properties to open the Properties window. 3. In the Properties window, select the General tab. Near the bottom of the window, verify that Read-only is not selected.
4. If the folder also contains a file called bookmarks.html.moztmp, verify that it is not marked as read-only.
Mac OS:
1. In the Finder, go to your Firefox profile folder. 2. Select the file places.sqlite. 3. From the menu bar select the File menu and select Get Info. The bookmarks.html info window will open. 4. In the bookmarks.html info window, remove the check mark from the Locked check box.