Opening VLPSET Files

The VLPSET file type is primarily associated with Firefox.

VLPSET	File extension: VLPSET
	File type:	encoded data file

What is a VLPSET file?

VLPSET files mostly belong to Firefox. An VLPSET file is an internal, encrypted data file used by browsers to manage secure lists.
It comes in two main forms:

Firefox usage: The file acts as an encrypted container that holds an Adblock Plus filter list, maintaining rules that help block unwanted content.

Google Safe Browsing usage: It stores a safelist of URLs and threat indicators, sometimes encoded via Protocol Buffers for fast processing.

FilExt.com notes: These files are maintained automatically by the browser software and are not intended for manual editing. To view or update the data, you must rely on the browser’s own tools rather than opening the file in a text editor. For more details on Firefox’s approach, visit the Firefox webpage and for Google’s safe browsing details, see Google Safe Browsing.

How to open VLPSET files

You need a suitable software like Firefox to open a VLPSET 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 VLPSET file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a VLPSET file directly in the browser:. Just drag the file onto this browser window and drop it.

Online VLPSET Text Viewer

Choose your .vlpset file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert VLPSET files:

Firefox
See the previous paragraphs to learn more about the main application. VLPSET files are often referred to as Firefox encodeds because this type of file is primarily created or used by this software.
Web browsers (e.g., Firefox) with extensions (e.g., Adblock Plus)
*.VLPSET files primarily store an encrypted list of websites and URLs, often employed by web browsers like Firefox in conjunction with extensions such as Adblock Plus. These lists contribute to enhanced user privacy and security by enabling the browser to effectively filter and block undesirable content, such as advertisements or potentially harmful websites, based on the data encompassed within the *.VLPSET files. A smaller segment of *.VLPSET files are utilized for safe browsing initiatives, containing data related to Google Safe Browsing lists, potentially incorporating Protocol Buffer Safelist Data. These files play a crucial role in protecting users from phishing attacks, malware, and other online threats by informing the browser about potentially dangerous websites or URLs. This file format is classified as Encrypted filter list.

VLPSET file extension format:

The file format determines how the data is stored in the file. Each file format has a unique extension and almost always a unique signature. For example, Microsoft Word documents have the extension .docx and the signature (usually the first 3 characters in this file) PK. If the file extension or signature does not match the file format, errors will occur when opening or editing the file. If there are problems opening a file, you must first determine the file format used. Below is our analysis of the VLPSET files:

The VLPSET file extension is not found very often and includes different formats for different programs. The following file formats are most commonly found in VLPSET files:

45% of all VLPSET files start with the bytes çb¸å crucial for this file format. These files are binary files, so they do not contain text, but only cryptic characters. Most of these files are 450 bytes to 620 KB in size. The file type is relatively new. An example of a file name is google-trackwhite-digest256.vlpset or ads-track-digest256.vlpset. Such files are related to social, protection, tracking and base.
30% of all VLPSET files start with the magic bytes 35 4A 04 36 01 00 00 00 01, which are always the first bytes of this file format. The contents of these files cannot be read by a human; only a computer program can interpret the data. The file size is in the range of 34 KB to 8 MB. The file name goog-badbinurl-proto.vlpset or goog-phish-proto.vlpset is characteristic of these files. These files are often associated with malware and downloadwhite.

All other VLPSET files (25%) have no uniform format. These files are often connected to unwanted, mozstd, content, cryptomining, analytics, facebook or email. You can get all the details of your VLPSET file by dragging it onto this page or by clicking the button "Choose your .vlpset file to analyze" above.

Technical Data for VLPSET File Extension

File classification:

Encoded

a vlpset encoded data file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with VLPSET files

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