CSS1 file format description
Many people share .css1 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .css1 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .css1 files.
1 filename extension(s) found in our database.
.css1 - CSS Backup
The CSS1 data files are related to Mozilla Firefox. CSS1 file is a CSS Backup. Cascading Style Sheets (CSS) is a simple mechanism for adding style (e.g. fonts, colors, spacing) to Web documents.
- Mozilla Firefox
- Data files
- - / -
- CSS Backup related extensions:
Naturally, other applications may also use the .css1 file extension. Even harmful programs can create .css1 files. Be especially cautious with .css1 files coming from an unknown source!
Can't open a .css1 file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Windows can't open this file:
To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.
To avoid this error, you need to set the file association correctly.
- Open Control Panel > Control Panel Home > Default Programs > Set Associations.
- Select a file type in the list and click Change Program.
The .css1 file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
cs1, css, ss1
Is it possible that the filename extension is misspelled?
Similar file extensions in our database:
- Scream Center for Seismic Studies Data
- STATISTICA Data Sheet
- Cygnus MK Data Logger Single Record
- Sinar CaptureShop RAW Image
- Cascading Style Sheets
DataTypes.net currently supports the following operating systems:
Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android
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