Firefox creates regular backups of your bookmarks in your currently active Firefox profile folder. If no bookmarks appear after an update, your company may be restarting you with a new profile folder. Very inconvenient. Can you check with them on whether that is intentional?

You can make manual backups to a folder more under your control, whether that's in Documents, on your Desktop, etc. Or whatever is allowed.

These articles describe two different formats for making copies of your Firefox bookmarks, the backup format which contains full data (e.g., tags) and the ancient export format which is cross-browser compatible. An advantage of the export format is that you could import it to IE Favorites as a second kind of backup, assuming those aren't blown away by your IT.

• Restore bookmarks from backup or move them to another computer -- creates a JSON-format file (not intended to be human readable)
• Export Firefox bookmarks to an HTML file to back up or transfer bookmarks -- creates an HTML-format file (can be viewed as a web page)

Finally, Mozilla offers a Sync service for Firefox intended to allow you to share bookmarks and other browsing data between different installations of Firefox (e.g., on desktop and mobile). While it isn't truly reliable as a backup service, you also could try it out.

• Access Mozilla Services with a Firefox Account
• How do I set up Sync on my computer?

These can't get your data back, but will help in the future.

These add-ons can be a great help by backing up and restoring Firefox

https://addons.mozilla.org/en-US/firefox/addon/febe/ FEBE (Firefox Environment Backup Extension)

FEBE allows you to quickly and easily backup your Firefox extensions, history, passwords, and more. In fact, it goes beyond just backing up -- It will actually rebuild your saved files individually into installable .xpi files. It will also make backups of files that you choose.

https://addons.mozilla.org/en-US/firefox/addon/opie/ OPIE

Import/Export extension preferences