Backing Up Your Bookmarks In Firefox
Within the "Organize Bookmarks" option, there is a clickable option along the top labeled Import and Backup. This allows you to save your bookmarks as a file browsers can recognize, or import a file saved from another browser. With just one plugin, however, you can go one step further and have your bookmarks automatically back themselves up online. There are many plugins available to back your bookmarks up online, but I suggest Xmarks.
Xmarks, formerly known as Foxmarks, saves your bookmarks to a web account, allowing you to instantly recover them should your browser ever need to be re-installed. It also backs itself up any time you make a change so that you don't have to back them up on your own. Most importantly, however, because your bookmarks are saved to your account online and not to a file on your physical computer, they can be recovered from any computer at any time, simply by downloading the Xmarks plugin to that computer as well and logging in. Now, your bookmarks can be easily accessed and altered at home, work, school, or anywhere else.
In addition, Xmarks will optionally synch all opened tabs across multiple browsers at once, and it supports most major browsers. It also allows users to review sites and will suggest recently bookmarked and well-reviewed sites when you search for things, helping you to hopefully find something even more useful to you. Finally, available only in Firefox, Xmarks has an optional password synch feature that allows you to recover your passwords from any computer instead of having to remember them, and it stores them in an encrypted format, protected by a PIN you choose, so that no one can steal them.
Either way, whether you choose to download a plugin or simply things up to your computer, you should always be sure to back up anything you wouldn't want to lose, and there's no reason bookmarks should be any different.
Once you have a set of well-organized bookmarks, backed up so you'll never lose access to them, you'll find that your browsing experience becomes much better. You won't forget about certain pages you wanted to read or messages you wanted to reply to for days on end. Things you meant to show to people will actually be shown to them. Follow the tips above, and you'll be free to make the most of your online time.