.XPI File Extension

Cross-Platform Install

XPI files are ZIP archives renamed that Mozilla applications use to install add-ons. The archives contain JS, CSS, HTML, JSON files combined that comprise the install code. Add-ons with icons have PNG...

General Information

Title XPI File Extension
Extension .xpi
Full Form Cross-Platform Install
File Type Compressed Installation Archive
Developer Mozilla Foundation
MIME Type application/x-xpinstall

File Function

Primary Function Install add-ons
Additional Functions Extension packages, Theme packages
Features Compressed, Contains resources

File Characteristics

Quality Standardized
Supports Layers N/A
Supports Transparency N/A
Editable Yes

Use Cases

Browser Customization Yes
Email Client Enhancement Yes
Application Extension Yes

Security and Practices

Security Risks Malicious code, Spoofing
Best Practices Download from trusted sources, Verify signature

Historical/Version Information

Initial Release 1998
Latest Version Related to browser version

Associated Types

Similar Extensions .zip, .jar

Software Compatibility

Software Usage Policy OS Compatibility
Mozilla Firefox Free Windows, Mac, Linux
Mozilla Thunderbird Free Windows, Mac, Linux
SeaMonkey Free Windows, Mac, Linux