1 file extension. How to open and convert files with 1 file suffix

There are 9 other file types using
the 1 file extension!

.1 - Unix unformatted manual page

.1 - Inno Setup binary data

.1 - Pro/ENGINEER backup file

.1 - GNU Screen log

.1 - Stuffit archive file

.1 - Super Nintendo split ROM image

.1 - The File Splitter split file

.1 - AIM AOL Instant Messenger file

.1 - Google Android cache

1 file extension - Mozilla Firefox cookie, image, popup permissions

What is 1 file? How to open 1 files?

File type specification:

Internet related file type

1 file icon:

File extension 1 is associated with the Mozilla Firefox and Netscape Navigator web browsers.

This type of .1 files is used for cookie, image, popup permissions files. It is used in earlier versions of these browsers.

Updated: January 2, 2025

The default software associated to open 1 file:

Firefox

Company or developer:
Mozilla Corporation

Firefox is very popular free open source web browser with many features.
Firefox supports tabbed browsing, private browsing, spell checking, incremental find, bookmarking etc. Other features can be added via extensions and add-ons, such as NoScript, Tab Mix Plus. FoxyTunes, Web Developer.

Netscape Navigator
(obsolete software)

Company or developer:
AOL Inc.

Netscape Navigator was multi-platform web browser popular in the 1990's. The project was discontinued in 2007. The last versions of Navigator was based on Firefox Gecko core.

Help how to open:

Likely can only be accessed using Mozilla Firefox and maybe only in particular (older) versions.

How to convert:

As far as we could tell, no conversion for .1 files is possible.

List of recommended software applications associated to the .1 file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open 1 file, edit 1 file, convert 1 file, view 1 file, play 1 file etc. (if exist software for corresponding action in File-Extensions.org's database).

Unspecified and all other actions for computer programs working with 1 file - Mozilla Firefox cookie, image, popup permissions

Click on the software link for more information about Firefox. Firefox uses 1 file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Microsoft Windows:

Main software associated with 1 file by default:
Firefox
Netscape Navigator (obsolete/discontinued)

Browse by extension type:

Internet related

Similar file types:

Popular topics:

Previous file extension
000 file extension

File-Extensions.org > Internet related file types

Next file extension
file extension 3DM

Note: We try to keep all external and related links up-to-date, however we are not responsible for the content of any site linked, further links on sites linked, or any changes or updates to the the information found on these sites. File-Extensions.org provides links to third party sites only as a convenience and the inclusion of such links on our site does not imply File-Extensions.org's endorsement of either the site, the organization operating such site, or any products or services of that organization. A visit to any site or page from our web site via these links is done entirely at your own risk.

Legal notice: You may not, under any circumstances, resell or reproduce any information for commercial use without the express prior written consent of File-Extensions.org. Scripts to automatically harvest results are strictly prohibited due to performance reasons and will result in your IP being banned from this website.

Enter any file extension without dot (e.g. pdf)
Search for file extension details and associated application(s)