WHAT Firefox

Download WHAT

By: YAHYA MANSOUB Add-on
Download WHAT (current and past versions) for Firefox
Latest Version: 1.0.0 Updated: 2 months ago

Ready to install?

WHAT is available to install from Firefox Add-ons Store and for download from this page.
View source code

Available versions

You can find the current and older versions of WHAT here. You can download the archived versions or inspect their source codes.

As a free user, you can download up to 3 latest versions.
Upgrade to download older versions
VersionDownloadSizeDownload countTimestamp
1.0.0XPI · ZIP · Source code226.44KB02026-06-06
1.0.0 226.44KB
2026-06-06 · 0 downloads
XPI ZIP Source code

Install XPI file

An XPI file, short for "XPInstall," is a compressed file format used primarily by Mozilla applications, like Firefox and Thunderbird, to distribute and install add-ons or extensions. These files are similar in function to CRX files for Chrome but cater to the Mozilla ecosystem.
  • Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

  • Download the WHAT ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the WHAT ZIP file from step 1. WHAT is now installed on your browser.

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