Opening an FBU File

The FBU file type is primarily associated with Backup program.

FBU	File extension: FBU
	File type:	backup file

What is an FBU file?

FBU files mostly belong to Backup program by mozilla.org. Firefox backup program backed up all Firefox extensions and other user data in FBU file format. FBU file may contain information such as extensions, bookmarks, preferences, user cookies etc. Using FBU file user can sync Firefox settings across multiple workstations.

How to open FBU files

You need a suitable software like Backup program to open an FBU file. You need a suitable software like Backup program from mozilla.org to open an FBU file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your FBU file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a FBU file directly in the browser:. Just drag the file onto this browser window and drop it.

Online FBU Text Viewer

Choose your .fbu file to analyze

or drag and drop it here

Online File Viewer

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Can't Open Your .FBU File? Try These Steps

Because .FBU files originate from various backup utilities, they aren't universally openable.

Identify the Source: A browser profile export suggests Mozilla Firefox, while IT-provided files may be proprietary server backups.
Check the Header: Inspect the first bytes in a hex or text editor:
- "PK" indicates a ZIP archive (common for Firefox FEBE backups).
- Readable XML/JSON suggests structured text.
- Scrambled binary implies a proprietary or encrypted format.
Use the Original Software: You usually need the exact creating program. Try the FEBE add-on, Mozilla's Backup program, or ask the sender.
Use this Webpage: Drag and drop your file into our viewer to detect its format, extract metadata, and preview contents.

Technical Data for FBU File Extension

File classification:

Backup

Related files:

xpi, jsonlz4, rdf

Related links:

Mozillazine Page, Reddit Page

an fbu backup file is a special file format by mozilla.org and should only be edited and saved with the appropriate software.

How to solve problems with FBU files

Associate the FBU file extension with the correct application.
Update your software that should actually open backup files. Because only the current version supports the latest FBU file format. Search, therefore, e.g. on the mozilla.org manufacturer website after an available Backup program update.
To make sure that your FBU file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .FBU file online - secure, fast, and no downloads needed.