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.xpi

File Type Cross-platform Installer Package IconCross-platform Installer Package
File Format Proprietary (Mozilla)
Usage Open manually; may be referenced by an application
Popularity ★ ★ ★ ★ ★  Popular
Description

Compressed installation archive that contains the main components installed with Firefox and Mozilla Web browsers; installed by Mozilla installer script; also used for installing Web browser extensions.

XPI files may often be installed by simply dragging and dropping the file onto an open Web browser window.
Open With
Windows

IconMozilla Firefox

IconMozilla Thunderbird

IconMozilla SeaMonkey
macOS

IconMozilla Firefox

IconMozilla Thunderbird

IconMozilla SeaMonkey
Unix

IconMozilla Firefox

IconMozilla Thunderbird

IconMozilla SeaMonkey
Published October 3, 2007
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Information from the PC File Extensions Reference
https://pc.net/extensions/xpi
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