Ext JS 3 DevTools Firefox

Download Ext JS 3 DevTools

By: 3axapp Add-on
Download Ext JS 3 DevTools (current and past versions) for Firefox
Latest Version: 1.7.2.0 Updated: 6 months ago

Ready to install?

Ext JS 3 DevTools is available to install from Firefox Add-ons Store and for download from this page.
View source code
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Available versions

You can find the current and older versions of Ext JS 3 DevTools 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
1.7.2.0XPI · ZIP · Source code221.93KB02026-02-27
1.7.1.0XPI · ZIP · Source code221.59KB02026-02-26
1.7.0.0XPI · ZIP · Source code221.59KB02026-02-20
1.6.0.0Paid users only213.31KB02025-11-13
1.5.0.0Paid users only211.51KB02025-09-24
1.4.0.0Paid users only211.53KB02025-07-24
1.3.1.0Paid users only215.87KB02025-06-22
1.3.0.0Paid users only216.72KB02025-04-12
1.2.0Paid users only216.27KB02025-02-21
1.7.2.0 221.93KB
2026-02-27 · 0 downloads
XPI ZIP Source code
1.7.1.0 221.59KB
2026-02-26 · 0 downloads
XPI ZIP Source code
1.7.0.0 221.59KB
2026-02-20 · 0 downloads
XPI ZIP Source code
1.6.0.0 213.31KB
2025-11-13 · 0 downloads
Paid users only
1.5.0.0 211.51KB
2025-09-24 · 0 downloads
Paid users only
1.4.0.0 211.53KB
2025-07-24 · 0 downloads
Paid users only
1.3.1.0 215.87KB
2025-06-22 · 0 downloads
Paid users only
1.3.0.0 216.72KB
2025-04-12 · 0 downloads
Paid users only
1.2.0 216.27KB
2025-02-21 · 0 downloads
Paid users only

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 Ext JS 3 DevTools ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the Ext JS 3 DevTools ZIP file from step 1. Ext JS 3 DevTools is now installed on your browser.

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