Hackbar-v2.9.xpi — -2021-

If you have this file sitting in your archives, keep it. Spin up a Windows 7 VM, install Firefox 52, and drag the .xpi in. Run a test against http://testphp.vulnweb.com . It will work exactly as it did in 2010.

For the uninitiated, an .xpi file is the classic installation package for Mozilla Firefox extensions. And Hackbar? It was the browser toolbar that turned your average Firefox window into a lightweight, manual SQL injection and XSS lab. Hackbar-v2.9.xpi -2021-

Posted on: April 16, 2026 Category: Tooling & Nostalgia If you have this file sitting in your archives, keep it

Recently, while digging through an old “PenTesting_Tools_Backup” drive, I stumbled across a file named Hackbar-v2.9.xpi with a “last modified” timestamp dating back to 2021. It felt like finding a vintage Swiss Army knife in a drawer full of electric screwdrivers. It will work exactly as it did in 2010

If you’ve been in the web application security space for more than a few years, the name Hackbar needs no introduction.

Do you still have a copy of Hackbar 2.x laying around? Or have you moved entirely to Burp/ZAP? Let me know in the comments below.