Your Bookmarks (and History) are stored in a single file, places. sqlite, in your Profile folder. To open your Profile folder, Help > Troubleshooting Information , then next to "Profile Directory" click the "Open Containing Folder" button to open the Profile Folder.

If you check specific websites for new content on a regular basis, Live Bookmarks can deliver the most recent updates to you, without having to visit the site. Note: Live Bookmarks will only work with sites that offer web feeds.

%APPDATA%\Mozilla\Firefox\Profiles\ A list of profile folders will appear. Click on the profile folder you wish to open (it will open in a window). If you only have one profile, its folder would have "default" in the name.

Type about:config in the address bar and press Enter. A warning page may appear. Click Accept the Risk and Continue to go to the about:config page. Search for useragent by typing it into the Search preference name field.