Everything About ___
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Everything about XPInstall

File format standing for Cross-Platform Install

XPInstall was a technology used by the Mozilla Application Suite, SeaMonkey, Mozilla Firefox, Mozilla Thunderbird and other XUL-based applications for installing Mozilla extensions that add functionality to the main application. Support for XPInstall was removed from Firefox in November 2017 with the release of Firefox 57. Wikipedia →

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  1. Read the overview: XPInstallA 5-minute orientation
  2. Go sideways: XULA closely related topic
  3. Go sideways: Add-on (Mozilla)A closely related topic

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